Head-mounted displays may be all the rage as of late, thanks to Sergey Brin's own recent fashion choices, but the space is hardly new. Brother, for one, has been in the game for a while now, with its AirScouter glasses, and before fellow printer-maker Epson steals all its glory, the company wants you to know that it's got some new wearable augmented reality on the way. The AirScouter WD-100G and WD-100A are being target