Instead of putting LCD displays in front of your face, a pair of tiny projectors on top of the glasses beams images to special surfaces that bounce the light right back to your eyes, at which point the shutter glasses filter out distinct left and right images to translate that into a 3D experience. The company has lots of ideas for how the tech could be used, from full holodeck-style experiences to Dungeons & Dragons-style tabletop gaming.

You can read our original report about CastAR right here, where we try out an early prototype unit — and discover how Valve magnanimously allowed fired employees to keep pursuing their passion for the project.