Pair it with a camera, to close the feedback loop: * The phone can track the environment and transform the picture to keep it stable. * Augmented reality appl

Pair it with a camera, to close the feedback loop: * The phone can track the environment and transform the picture to keep it stable. * Augmented reality applications (a la http://www.pranavmistry.com/projects/sixthsense/ http://www.pranavmistry.com/projects/sixthsense/)