At the Comic-Con panel for Kinect Star Wars earlier this week (the same panel where that R2D2 Xbox was announced), Microsoft's head of Kinect Jorg Neumann told the story of how the game itself came about. Back in 2008, when Kinect was still called Project Natal, and basically consisted of just a camera in a back room at Microsoft, Neumann and his colleagues found an engineer playing with game prototypes on the system, and one of those was a lightsaber simulator. That alone convinced Neumann and his division that Star Wars needed to be on the interface in some format.
And it turns out LucasArts didn't need much convincing either. Lead producer Craig Derrick described flying out to the Microsoft campus to see the proposal for the game, and saying among his own colleagues that all they planned to do was hold out their hand and see what happened. As soon as they pushed a hand out to the Kinect unit, said Derrick, "it knocked over a bunch of droids, and we were like, 'OK, we're in.'"
We saw the game's Force-driven droid pushing and lightsaber waving at E3, but Microsoft and LucasArts introduced a new mode to the game this week: pod racing. Anakin Skywalker's motorsport of choice is in the game as well, and I got to take a pod out for a spin later on in the week at a Microsoft preview event.