Look out Microsoft, you are going to get sued for patent infringement with your Kinect device when Apple invents it in a year or two.
But seriously, I do worry a little about this. It seems that Apple is now highly litigious when it comes to anything that smells like competition, and rather than try to make a better product in response, they seem to be more than happy to abuse the patent system and shackle their competitors instead. Gesture controls in daily life would be cool, but users lose if there is not a healthy competitive environment among tech companies.