If innovation is your thing then a Wii U is a great bet. To be honest, it's already worth getting for Bayonetta 2, but the back catalogue of Nintendo games already available are great deal sweeteners!
Ok, so third party support is not so hot. But with greats like Zombie U, Mario (all of his Wii U appearances are awesome) and Smash Bros, you cannot go wrong.
Backwards compatible with the Wii, nunchuck and remotes but unfortunately NOT the Gamecube, which I have some great games for...
The Nintendo E Store is pretty cool, with some occasional discounts and a virtual console affair, mostly games from SNES and game-boy colour at the moment.
I really like the fact that if the kids are watching TV, I can still play on the small screen in the controller, even if the colour saturation is a little washed out.
Oooh, and Monster Hunter 3! Hardcore game and well worth a look!