The Science Museum in London used to have a life-sized holoportrait of Denis Gabor. It looked like a milky plate until you pushed the button that turned on the laser, and... there he was. Stunning.

There was a short-lived flurry of art establishment interest in high quality glass holograms, but the process is just too expensive and fragile to create non-niche art.

I always expected that at some point we'd have dynamic holographic displays, but the processing and resolution requirements are insane.

Holographic film has a resolution in the region of 100,000 to 250,000 ppi, which is quite a bit more than 300dpi for print or a few thousand PPI for plain old film. If you could build a 27" display with that resolution you'd need maybe 1TB per frame at a minimum.

You could probably apply quite a bit of compression to get that down on input, but that's still the order of a workable frame store memory.

Multiply by three for colour.