EA just announced at its GamesCom 2010
conference that Harry Potter and the Deathly Hallows: Part 1
for Xbox 360 will magically lift butts off of couches, with some Kinect support. EA didn't put it exactly the same way, of course. The game features an on-rails mode in which players gesture to cast spells, moving automatically from location to location, and competing to achieve the highest score.
This would explain why Walmart offered Deathly Hallows: Part 1
in pre-order Kinect bundles. The game has, however, since been removed from the promotion.