[yters]

That's along the lines of what I was thinking. Say you had a laser tag game with this system. Then, online players could be projected onto a physical player's HUD, and visa versa. The arena itself could have RFID tags on corners to easily provide the geometry for clipping, so the virtual players aren't just superimposed on the HUD.

Now, if the technology that generates 3D details from pictures progresses alot more, then the system wouldn't even have to resort to hacks like RFID tagging.