I would almost imagine gloves like this would be a requirement for precise control. The Kinect had seemingly pretty decent limb sensing from the few minutes I played with it (it was able to accurately model the bones in my fingers moving). However, it had an advantage in that it was a few feet away, viewing you straight-on.

This device will be looking nearly straight down instead, and seems to me that your limbs & fingers will often occlude what is behind them. I doubt the twin cameras used to sense depth would be far enough apart to always see your fingers behind your other arm, for example.