I've been following the NX rumors from a news alert I set up, and the recent stories about Smash coming to NX as a launch title have me really excited. I skipped purchasing the Wii U (like most people did), but now I'm really excited to own a console again. Playing smash on a 3DS just doesn't cut it for me.
I theorize that there will never be another "new" smash game released. From this point on, all of the latest smash content would be downloadable - stages, characters, even single player modes that have been omitted somewhere along the way (board the platforms, race to the finish, target test, etc.).
That would make sense to me, anyway. Smash just isn't the kind of game that needs to be completely remade for a new console, and since consoles as we know them are on the way out anyway (with "platforms" taking over), porting Smash 4 to the NX and letting DLC enhance it from now on would a be pretty logical decision.
I also think Nintendo will finally get online gaming right with the NX, and there have been plenty of rumors suggesting that while the NX is a console in the physical sense, the way it operates will be closer to how Steam works, where you can download any game developed for the NX "platform", manage your data over Nintendo's servers, and connect to friends in a way that actually makes sense (no more stupid friend codes).
In any case, I'm glad Nintendo seems to have learned from the Wii U's failure and are taking the future of video games seriously now. Ideally, there would be no more proprietary hardware, only software developers making games for whatever platform will have them. That would take a bit of the stranglehold that publishers now have on the industry away and give more influence over the availability of successful titles back to the players, benefiting us and the original content creators more directly.