You can tilt the controller horizontally and vertically, like you would a joystick I suppose. I can see that being useful for when flying aircraft, possibly driving cars/motorbikes too, I'm not sure.
I also feel that if GTA was on the Wii, the controls would be pretty difficult to master.
Sounds cool. Makes me more confuse for what I should buy
I'v seen legend of zelda tlp yesterday in a gaming special. It does really look cool. (I was a legend of zelda fan before gta) But Nintendo doesn't really have a normal controller. They should have put one in with all that other stuff. If they would do that and gta came I'd probably buy it (after the 360) or if I buy ps3 it wouldn't buy the Wii, it would just be to expensive