A patent filing made public last week suggests that Google may be trying to implement a motion-detection interface, like Microsoft Kinect, for portable electronic gadgets. The patent application is for technology that turns a mobile device's camera into a motion-input system. In other words, it could be goodbye to fingerprints and streaks on the front of your tablet or smartphone. Google could incorporate such a feature into Android in general or keep it as a differentiating advantage for its acquisition of Motorola."