If one were to take the concept of a cathode display, and replace the electron gun with an ultraviolet laser, and the grate with a large sheet with the various phosphors painted on (phosphors glow when exposed to UV light), might one make a serviceable large low cost screen? I imagine the laser would be better positioned like an overhead projector.
A big problem is that a UV laser would probably temporarily blind anyone who looked into it. Creating accurate scanning using light is much more difficult than with electons, you can't use simple electric/magnetic fields to aim the beam.
I don't know if it is possible to make some sort of electron releasing fabric, which would create uv light, covering this fabric with a fabric with coloured phosphours could give rise to light. Something similar is done with screens using coloured leds, but those leds are all individual.