I don't think the data requirements are that realistic. While the actual interference patterns on a hologram would be ridiculously large to send as a bitmap, it's easy to compute the interference patterns for the superposition of points of lights, which is what this volumetric display is showing anyways. So a computer would only need to send a list of points and colors to the display.
http://en.wikipedia.org/wiki/Computer-generated_holography#P...