From the current issue of The Economist:
"Such glasses do exist. So far, though, they have made a bigger impact on the workplace than in the home. Companies such as Ubimax, in Germany, or Vuzix, in New York, make AR spectacles that include cameras and sensors, and which use a projector mounted on the frame to place what looks like a small, two-dimensional screen into one corner of the wearer’s vision.
Used in warehouses, for instance, that screen—in combination with technology which tracks workers and parcels—can give an employee instructions on where to go, the fastest route to get there and what to pick up when he arrives, all the while leaving both of his hands free to move boxes around. Ubimax reckons that could bring a 25% improvement in efficiency. At a conference in London in October, Boeing, a big American aeroplane-maker, described how it was using AR glasses to give workers in its factories step-by-step instructions on how to assemble components, as well as to check that the job had been done properly. The result, said Paul Davies of Boeing’s research division, is faster work with fewer mistakes."