first the nords make an tank-implementation and now Russkye make their own !
... doe, no LCDs, just pure reflex collimator/HUD tech. But is interesting what they do - they have a periscope for each eye, witch has a contrast filter and onto the goggles, they project HUD information and a projection of aircraft positions (taken from radar data and possibly from future integrated Air systems - objects in air from all air and ground based radars from kinda US battle network) ... its an interesting idea for an addition for the oculus feel, when sim/game helmet HUD elements get a kick in.