Appearntly we just got one step closer to the goggles described in Virtual light.
A snippit from this story:
"...A technician with data goggles bends over the engine block of a luxury car and removes the covering. He is receiving instructions through an ear piece telling him what to do next while his data goggles mark the screws and bolts on which he must next place his tool. When he turns his head, the instructions and markings still stay in the same place: A tiny camera on the technician's helmet reports each of his head movements to the computer, which makes the necessary corrections."
I gotta get me one of thoes. Can you immagine all the cool things you could do with it?