Let me tell you: if you were the one doing the design of a motion sensing system, I can bet it wouldn't be "easy". This sentence makes no sense. The patent in

Let me tell you: if you were the one doing the design of a motion sensing system, I can bet it wouldn't be "easy". This sentence makes no sense. The patent in question is not on a single technical implementation of pinch-to-zoom; it is on pinch-to-zoom in general. It does not merely protect the (easy) engineering needed to detect two fingers pinching, it protects the idea of "two fingers pinching = zoom". This is an obvious idea, and should not be protected by patents.