2 reasons: Competitive gamers (the ones that do EVO and crap) play console versions of games. Many people will buy a Wii U because of Smash Bros alone. It's a big 6 release: Mario Kart, Smash Bros, full 3D mario adventure, Mario Party, Legend of Zelda, Metroid. This are titles that in one way shape or another always sell consoles.
and...
It's a new and rather large release that has, not only gamecube controller support, but the multi-game feature of Amiibo.







