After watching this trailer. I can definitely say Nintendo has clearly learned from everything that went wrong with the Wii U. First and foremost, the name. At first, I was a bit unsure of the decision to have Nintendo's name in the finalized title, as I wanted the system to stand on it's own and not have to leech off an old brand name because Nostalgia. But Nintendo Switch actually has a pretty nice ring to it. The Nintendo name actually compliments the concept rather overpowers it, plus at this point, anything would've been better than "Wii U". Second, the concept. The Switch clearly has a lot more thought put into it's gimmick than the Wii U ever did. The Wii U was a trainwreck of jumbled, underdeveloped ideas forced into a confusing, poorly designed package. But the Switch's ideas are much like the Wii, In that it's simply just one idea, used in a variety of applications. And the different concepts they showed all make sense for gaming and don't come off as underdeveloped, or pointless.
Which brings me to marketing. Now granted, it's only a 3 minute trailer, but what we have seen is still much cleaner and simpler messaging than with the 2 E3s the Wii U had. Everything they had to show about the system is shown off, and the gimmick never feels like it overstays it's welcome like the Wii U trailer did, as again, it's simply just one idea executed in multiple ways, rather than some cluttered contraption filled with useless technology that nobody knows what to do with.
There's still a lot we don't know about the Switch and Nintendo will probably doulge out more info as in the coming months leading to it's release (at least, I hope they do). But so far, this is about what I expected. Nintendo Switch is the new Sega Dreamcast. No, not in the sense that it will inevitably fail (though that is an unlikely possibility), rather it returns the company to what made them popular before, and fixes the mess that it's predecessor made. The difference being that Nintendo may have a bit more time to amend their place in the market than the poor Dreamcast did.