You realize how disingenuous it is to compare no backwards compatibility to offering it on a "unified" platform and then breaking up a part of that platform into hardware-specific pieces, right?
I mean, especially considering everyone's favourite talking points about the Wii U and 3DS failures were how unclear their marketing message was to the reality of the product, right?
I just want to be sure you're aware that you've compared apples to a slice of moldy bread.
The selling point of the NX isn't that both devices play every single Nintendo game ever created out of the box*, it's that if you buy an NX game, you can play it on both the console and/or the handheld. In fact, that's not even it, the selling point is that, by integrating their hardware devices into one ecosystem, they can release more games for each of their devices. Most of their customers are just going to buy one device or the other (mostly the handheld), and they want to make sure they have as many games as possible to tempt people in, regardless of which form-factor they prefer. Being able to buy a game once on eShop and play it on both devices is pretty much just a bonus on top of that.
*Which, by the way, is pretty much impossible. Unless you expect the NX home controller to also act as a Wii remote + nunchuck, and you expect them to cram a PowerPC chip in the handheld to allow it to play GC, Wii and Wii U games (never even mind how you expect to be able to control Wii games on the handheld).
I think you need a refresher on just how much money Virtual Console has made Nintendo with its first-party titles alone. Sony might not want to throw money after it, but Nintendo sure as hell would, because they've made more money out of it than Sony could hope to achieve, they know the value of it, so long as it's done right.
Do you expect their VC profits to be entirely centred on Wii U games? There's nothing to stop Nintendo supporting NES, SNES, N64, GB, GBC, GBA games out of the box on both consoles, which will cover the considerably majority of profits Nintendo would expect to make on the service. The handheld could play DS and 3DS games out of the box, and the home console could play GC games out of the box, with Wii and Wii U games requiring peripherals.
It's not exactly something vastly confusing for customers. It's not like people are going to expect the NX handheld to play Wii games.
And this is without discussing the negative aspects of their likely-intended marketing message, something Nintendo seriously can't afford to screw up again, or at least not as blatantly or intentionally as what you're proposing would.
Nintendo's failed messaging with the Wii U had nothing to do with BC/VC and everything to do with the gamepad. Watch
Nintendo's 2006 E3 conference and see how easily people understood the concept of the Wii remote. All they had to do was show a quick video of people playing Wii tennis, golf and bowling, and the appeal was obvious.
Fast forward to the
2012 E3 conference, though, and watch Eguchi attempt to explain how Luigi's Ghost Mansion works (it's about 1 hour in). Nintendoland makes excellent use of the gamepad, and it's a better game than Wii Sports in pretty much every way, but that can't overcome the fact that it's inherently difficult to explain to people the advantages the gamepad offers. Add to this the fact that multiple players needed to use different controllers, and you've got an interface that is possibly the most confusing of all time, coming after probably the most intuitive controller of all time.
No, they attempted and failed to sell people on a controller with a screen in it being a marquee feature of a console with last-gen graphics for $350. There's a bit of a difference, that burden doesn't fall to the Gamepad alone.
And you think the controller screen had nothing to do with the $350 price?
They don't use it for all that much more on the DS and 3DS either, but that didn't stop them. So.............
See the above example.
The 3DS was coming after the 150 million selling DS, so they tried to imitate the DS as much as possible (just look at the logo). The Wii U hasn't even sold one tenth of that yet. Besides, the 3DS wasn't an attempt to create a long-running hardware-agnostic games platform. It was very firmly developed in the old school of pressing reset every 5 years or so and starting from scratch.
Except, y'know, I don't want to ALWAYS play on a screen that isn't my TV. Nor do I wish to buy a $200+ device just for that function alone. And neither will anyone else.
Actually, about five times as many people want to play Nintendo games on a screen that isn't their TV versus a screen that is their TV, judging by 3DS/Wii U sales figures, so you're quite definitely in the minority on this one.
Actually, that overlap is minimal to non-existent. GAF is not an indicator of the larger market. Most 3DS owners don't own a home Nintendo console. Just need that clarified.
Well of course most 3DS owners don't own a Wii U. It's statistically impossible (unless the average 3DS owner owns like 4 3DS's). But what I think is safe to say is that the set of Wii U owners who care about Wii BC are likely to also own a 3DS. And assuming the handheld NX sells more than the home console (statistically extremely likely), then I would argue that the (small) group of NX home console owners who care about Wii U BC are generally going to be Nintendo fans and are quite likely to own a NX handheld anyway.
Where's the touch screen you'd need to play those DS games if both screens are on the TV? So now you're going to have them say "yes, we have backwards compatibility for our most successful game hardware ever!.... except you can't play on your home console, and I hope you like to squint on your handheld!"
When did I say the home console should play DS and 3DS games? Why would people expect it to? Do you think the same people are going to expect to play Wii and Wii U games on the handheld?
I know Nintendo have released some DS games on Wii U, but given the small number of titles released I wouldn't be surprised if it was simply a way to explore how well dual-screen games translate to a single touchscreen (which it turns out is pretty well).
Whether or not something is commercially viable depends greatly on its messaging, which is completely thrown into jeopardy by your proposal advocating against it.
But as I explained earlier, Nintendo's success in selling home games consoles is directly correlated to how intuitive the system's interface is. Their messaging is more complicated (and less likely to succeed) the more time they have to spend explaining just how to play the thing. The logical deduction from that is that they should make the interface for the NX as simple and intuitive as possible, and placing a screen on a controller goes in completely the opposite direction from that.
In fact, even aside from that, I think Nintendo's messaging should be distanced as far away from the Wii U as possible. If they have another controller screen it's going to immediately be seen as the follow up to the Wii U, and that's anything but good for the console in the eyes of the press, the public, and third party developers.