I agree this could be done with a vision system, but I think you're underestimating the challenge of it. You're proposing they build an experimental < 50ms visi

I agree this could be done with a vision system, but I think you're underestimating the challenge of it. You're proposing they build an experimental < 50ms vision based tracker which would need a high FPS camera and a special coupled processor with novel algorithms and PC drivers which were tuned to rapidly ingest that processed signal. Interfacing with a 6-axis sensor over bluetooth seems way more sane for a project of their scale. I disagree with your second point. The slight fuzziness of kinect and the additional 50ms-80ms of lag is absolutely enough to ruin the game and thus it's not a good test of the other mechanics. To see why, watch this short and enlightening video on why most motion games are not fun: http://www.penny-arcade.com/patv/episode/kinect-disconnect http://www.penny-arcade.com/patv/episode/kinect-disconnect If anything, they should have prototyped it with PS3 Move or Wii+