A new preview video for the upcoming Forza 4 has appeared online. Whilst it doesn't appear to be an official release, it definitely looks to be legitimate, though it could in fact be an unfinished leak. Whatever the case, it is sure looking great thus far. As well as the standard graphical and gameplay upgrades, the trailer shows another brief glimpse at the Kinect features such as controller-less driving, head tracking and the car viewing mode. Check out the video below!