Perhaps it's just wishful thinking on my part but it's very very obvious to me that the NX will be fixing the majority of their dedicated hardware problems:
-First, one of the main reasons the Wii U failed -which people often forget- is that Nintendo was focusing most of their development time on the 3DS which failed to sell nearly as well as they had hoped. The 3DS started selling quite a bit after that software came out but then the Wii U started sputtering because there was little in the way of software support after launch. So in essence the 3DS was one of the reasons the Wii U failed to sell.
Essentially - the Wii U lacked games. But here is the thing, the Wii U's biggest problem wasn't the lack of software - Sony's PS4 had the same issue. The problem is that the entire concept, the actual hardware, the name - all unappealing factors in the market. the 3DS didn't affect any of that - it was poor decision making and one of the worst marketing jobs I've seen any company do.
One of the things we KNOW is that the NX will solve this problem because they have combined handheld and console divisions and made a conscious effort to make development between two devices much easier. This information came straight from Nintendo.
Software droughts from Nintendo will and/or should be fixed due to this, and the fact they decided not to push it out this holiday just to hit sales knowing there would be months of nothing until the next game.
-Second, Nintendo has discussed several times that they do not like the console cycle which creates this situation of the consumer buying new hardware and then "starting from zero," library and install base wise. I believe it was Iwata who said that one of the main focuses of the NX is to set a single unified games platform going forward, such that every subsequent NX system (or SCD upgrade) will be backwards compatible with previous NX systems, and that publishers will feel confident releasing their games on new systems because they will likely be able to be compatible with previous systems. Forward and backward compatibility, essentially.
They did compare some of their outlook to Apple, but we don't actually know that is what they are going to do. It's all speculative at this point. All they have said is that over the years, the mentality of starting over again has always been a challenge.
This is in stark contrast to how the Wii U works, and in stark contrast to how the Wii U to NX transition will work, unfortunately. Unless of course the "absorbing the Wii U architecture" means that they have a BC solution, which I doubt.
This is in stark contrast to how ANY home console has ever worked. Some offered last gen BC, but you often coiuld not carry digital purchases over and besides Nintendo, BC never worked for the whole backlog (save early PS3's).
Until it actually happens, we can't be sure that it will. One thing is for certain - if that is the future they want, they likely will NOT include BC for Wii U, because they would have to eat costs to put a Wii U inside the new system. Instead, they'd want a new setup so while the NX is resetting things one last time, it could provide a brighter future where you can be confident in knowing purchases on it moving forward stay forever relevant. Just like on PC.
-Lastly, Nintendo has made it clear that they want the young guys (Splatoon garage-type teams) to start having greater input in not just the garage games, but the future hardware and overall direction of the company. This will likely revitalize some of their stagnating IPs judging by the success of Splatoon, and should be taken as an indication that Nintendo understands that some of their past decisions have been a bit old fashioned.
They haven't said they wanted their input on hardware. Just that they were going to allow more creative freedom. Hardware was likely decided before Iwata passed and Splatoon even released.
This all indicates to me that Nintendo is in a major period of restructure, and are focusing greatly on improving their dedicated hardware business, not at all backing away from it. You may get that idea from games like Federation Force and the new Paper Mario, but I see those games as essentially filler games that weren't considered important enough to be delayed to the next console. Again, that could be wishful thinking but I think it's clear that they have solved or are in the process of solving a great deal of their hardware problems.
Now none of this addresses third party support but that's a whole other animal which isn't necessarily that relevant to your point.
Nintendo has definitely not moved away from hardware, or indicated they will. Rather they are trying to expand their IP and business reach to not be solely dependent upon top selling hardware platforms, that way they can continue to release hardware even if it's not the most popular gaming item on the market. Start releasing movies where yes, some people will see the movies who never intend to buy the games, or get some games on phones and recognize the shift in the mobile market - get some theme parks rids and attractions going, more merchandise and toys, yada yada.
Health too, whatever they are doing there. Nintendo is restructuring and branching out to cause long term business growth with heavy short term investments. NX is still part of this - arguably it's at the center. They are just redefining what their future hardware is. It's entirely possible the NX's gimmick isn't that they have some super funky controller, but that they are offering an ever upgradable living room PC type unit where everything stays compatiable, with notable enhancements when you upgrade to the latest version of NX.
In this way, NX can release at Xbox One levels and not be a huge deal, as a new NX would be releasing by the time the rest are ready, and the key advantage is that Nintendo set things up to not make you feel like you need to upgrade today or tomorrow, but if you do you know you maintaine verything. It's seemless, just like upgrading a phone in the same brand line.
But, this is still all speculative. We don't actually know.