I swear I remember reading in the 80s about the Air Force having monochrome VR goggles consisting of a per-eye laser, magnetic oil lens for per-pixel depth focus, two perpendicular rotating mirrors for the raster scan and a curved glass lens to reflect and focus the raster scan on to the retina.
Yeah, I mean I haven't been to Vegas myself, but I've had pillow talk with some people who went.
(All illuminated signage could be said to draw on one's retinas, after all. The major differences I see with this method beyond improved gamut are first that it rasters, and second that I think we have to worry what happens if it fails to raster...)
