In my opinion, the Wii's graphics chip isn't exactly top notch. I was at a friends house and we were playing Guitar Hero Aerosmith on his rather huge plasma tv. Everyone was having a hard time playing and hitting the notes properly because the game was lagging. It was lagging honestly. A console was lagging. That's shocking.
If people with large TVs and Wii's buy this game they're obviously going to have difficulty playing.
I suggest it be suited more for the PS3 and Xbox 360, mainly because they have more buttons and a stronger capability.