"Kinect-enabled project" at E3.
The tech demo at E3 2010 highlighted "experiences possible" with Kinect and Forza. The next instalment still has "controller-based racing", but also motion.
"We showcased a Kinect-enabled project from Turn 10 Studios at E3 2010, which let players explore and experience their dream cars like never before," said Microsoft. "That tech demo demonstrated some of the experiences possible with Kinect and Forza."
"Forza Motorsport 4 brings together genre-defining, controller-based racing and the power and freedom of Kinect to create an automotive experience unlike anything before it." Forza Motorsport 4 had a debut trailer at the Spike VGAs - see it below.