Fun fact. The military started using AR at the start of the Iraq invasion. Product was essentially Google Glass with facial recognition against a static/ local dataset (stored on device), but in 2004 - for identifying wanted suspects at checkpoints.Was produced by a company called Osterhout Design Group. Ralph Osterhout also had the distinction of creating the PVS-7 Night Vision goggles in 3 months - still used to this day.Ralph was a pioneer in waveguide technology that went into ODG's AR glasses. The display tech from the Hololens? Licensed from ODG. Time is a flat circle I suppose.