Realizing it is April Fool's, if this video is a fake, someone went to a lot of trouble to create something that delivers no punchline. Here is a solid three minutes jampacked with in-game footage of Forza 4, touting a lot of features we'd scented from a marketing survey that went out last week.
Details such as Kinect-supported head tracking, Kinect driving controls in casual gameplay modes, advanced lighting and modeling, social networking features and a deep list of manufacturers were all tipped off earlier.
Contacted by Kotaku, a Microsoft spokesman confirmed the video's authenticity.
The video in question was not intended for public distribution and may not accurately reflect features and functionality that ship in Forza Motorsport 4. We will have more to share on Forza Motorsport 4 in the near future.
Forza 4 Gameplay Preview [YouTube]