Patent applications are full of hope and broken dreams, as it's far too easy to let a rampant imagination read beyond the layers of patent-attorney penned boilerplate. In the realm of the realistic, this application from Microsoft concerns a head-mounted display with a narrow-beam laser packing two dilation optics (us neither). If you then variate the diffraction grating between the two eyepieces, you create a three-dimensional virtual reality display. As much as we'd like to prowl the digital touchlines in Fifa Soccer with
