I believe it has more to do with how much data you can get your hands on. With the kinect - widely available depth data, and cloud computing, I believe a lot of

I believe it has more to do with how much data you can get your hands on. With the kinect - widely available depth data, and cloud computing, I believe a lot of things that seemed difficult are now possible. Open source movement needs to start shifting to crowd sourced data and volunteered compute time movement.