slowmo on 22 May 2010
Just some food for thought Ironman, I agree that Natal is leagues ahead in terms of what it can do but it is possible to gauge 3D depth with just one camera. Think from the perspective of a human, if you only have one eye then you still can gauge depth, in fact some people will aim guns with just one eye (not recommended imo).
There is other ways to track depth rather than just steroscopic methods, check out the following link and note how many different tools there are for determining depth. I know it's wiki but you should get the idea.
http://en.wikipedia.org/wiki/Depth_perception
