I now guess that it's an OLED display with a lens array in front of it so the image is only visible from a narrow range of directions. That way you could display a different image for each direction. You could also easily feed it from cameras. Either by putting dozends of cameras around your subject or by putting fewer cameras and interpolating.
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Better guess
I now guess that it's an OLED display with a lens array in front of it so the image is only visible from a narrow range of directions. That way you could display a different image for each direction. You could also easily feed it from cameras. Either by putting dozends of cameras around your subject or by putting fewer cameras and interpolating.