[quote name='MisterHand']You're forgetting that in order to get the motion controls on the 360 you'll still have to buy a whole new controller.[/quote]
I'm thinking that they won't just come out with a $50 motion controller in stores randomly. They'll probably bundle it with games and possibly systems for a decent price. They're far too behind with the motion control thing to just release the controller in stores. Plus, we don't know if this could just be a $20 thing you plug into the normal 360 controller. We'll find out soon enough, though.