The Wii U is good enough for Nintendo's IP.
Even to max out a PS3/360, it would take a developer a massive budget to do so (see 343 Studios and Halo 4). Let alone the Wii U which is apparently modestly more powerful, but still another step forward.
Nintendo is conservative with their development budgets, they're not going to spend $100 million on any game, not even a Zelda or Mario game.
Maybe some day down the line they can release a Wii U Slim that allows for 1080p output/display for newer games, I'd be OK with that (kinda like a DS to DSi bump).
Mario, Zelda, Donkey Kong, etc. will look great on the Wii U. I'm OK with that.







