3d white flashpoints for adhoc traffic signs and ads? laser display in thin air.

the display utilises an ionisation effect which occurs when a beam of laser light is focused to a point in air. The laser beam itself is invisible to the human eye but, if the intensity of the laser pulse exceeds a threshold, the air breaks down into glowing plasma that emits visible light.(new scientist)

improve lightweight near-to-the-eye displays and titled stereoscopic large size displays. (improve)