3DS successor will have no real opponent and take all handheld gamers for itself. So it should at least be stable, because there is a coregamer base on handhelds that likely wont walk away to smartphones/tablets.
Wii 3 should be up, as long as Nintendo doesn't make a ton of mistakes again. If they show up in 2017/2018 with actually powerful hardware, free online but improved services it could do very well compared to Wii U.







