TURN 10, from the stage at E3, has just completed its demonstration of Forza Motorsport 4. The game will be out on shelves on October 11, 2011, Kinect support (as previously announced) with voice commands and head tracking. Also will support online racing for up to 16 players, monthly updates, and content created by the comunity. The following two videos of what was shown.

Forza Motorsport 4 - Trailer | HD version
Forza Motorsport 4 - Unique Vision