Engadget was on hand to witness Kinect Adventures' Rally Ball minigame being controlled not just by a Kinect, but also two Windows Phone 7 devices controlling the flow of rubber balls being distributed. It's all fun and games until the gentleman playing is overtaken by a monstrous flood of rubber balls.
Microsoft notes that the demonstration was strictly a "tech demo," but it certainly hints at the possible future of Windows Phone/Xbox integration. It also opens the pandora's box-like door to Kinect/WP7/Surface crossovers, finally. Get a look at synergy in action just after the break.