Nintendo sure is full of awesome surprises, this is one amazing surprise for all fans of Xbox 360 and Nintendo GameCube controller design, Nintendo has revealed their new controller for the Wii U console: Nintendo Wii U Pro Controller Revealed - Nintendo E3 2012 - YouTube
It should be noted that this is an alternative to the Wii U gamepad which has been showcased many time thus far. I personally like this design over the huge gamepad with the screen on it. We'll see what Nintendo has in store for E3 over the next couple days.
Looks good to me, i would personally use it over the huge screen controller where possible. On the Wii i liked to use the GameCube controller on games like Mario Kart and Samsh Bro's.