Major Nelson posted the list of activities and upcoming Kinect and XBLA titles that will be playable at Microsoft's booth, including Trials Evolution, MineCraft: Xbox 360 Edition and Steel Battalion: Heavy Armor. We hear one of our editors really liked that last one when he got a chance to play it earlier this month.
Also of note is a playable build of Dust: An Elysian Tale, the winner of 2009's "Dream-Build-Play" competition. It's currently slated to launch on Xbox Live Arcade in 2012.
Microsoft Xbox One