I stated I was especially interested in the recognition software for Microsoft's Project Natal as the motion capturing as demoed highlighted low accuracy and obvious delay.
However the current state of affairs seems to be a lot less advanced as Microsoft wanted us to believe:
"All I’m going to say about Milo is that its not legit. there were a lot of smoke and mirrors going on there, not the case with the ball demo [Ricochet] and the other stuff but with Milo there was definitely a little bit of deception going on."
http://gamer.blorge.com/2009/06/07/exposed-natel-milo-smoke-and-mirrors-by-peter-molyneux/
In hindsight I think Microsoft knew Sony was likely going to reveal powerful new technology, thus opted to try to steal the show, nomatter how deceptive they may be towards gamers and the press to achieve this goal.
Nintendo could have showed a video of a hollodeck for the Wii to up the ante as well, with very little actual merrit to steal the show.