Useless Kinect demos appear on Xbox Live

In one ofits cleverer moves, Microsoft has publishedtwo demos on the Xbox Live Marketplace which require the Kinect controller. Great,so you can try out the games before you decide to plop down the money for Microsoft's motion-sensing peripheral! Oh, wait... something doesn't add up here, does it? The demos, whichare forKinect-only gamesDance Central and Joyride, were posted on the Xbox Live Marketplace