Today, Nintendo presented the new controller for their new Revolution console (to be available in 2006) which was held under wraps for a very long time to prevent the idea being stolen by Sony and Microsoft.
The main innovation is that the "remote control thing" is position sensitive, i.e. the game knows (wirelessly) where and how you point it. You really have to read this article to get all the interesting ideas Nintendo came up with.
Of course I am not sure if this catches on, but I like to see Nintendo innovating while others are increasing polygon numbers...
UPDATE: You can see video of controller in action here.