A very "entry level" not good but maybe enough to kick off an industry digital transmission hologram would be like "hundreds of gigapixels" or at least dozens and thats not realistic for computers of this time. The super cool reflection holograms are much worse, like "many dozens of terapixels" to even begin to play with.
I guess its good news there are still frontiers of computation out there to reach. A lot of people believed progress would cease when computers could do high enough resolution video, and they're mostly correct, progress has halted for the general public. But if we ever get smart phones with low petabyte fast on device storage and display, those could realistically have "star trek" like transmission holograms.
That beings up some interesting issues WRT RF engineering. Shannons law and all that. Even with unimaginably complex compression algos will something like a hand held hologram video conference (similar to sci fi tropes) ever be possible? Maybe 60 PB/s would not be unreasonable. Consider the LHC only generates about 1 PB/s when its running and that takes a rather large distributed system and a lot of electricity. I don't think video conference holograms will be realistic... Strange thought experiment the only way to do a "holographic video conference" with sane data transfer rates and power levels might be to send the other side a LLM prompt and ask for a locally AI generated video hologram. "Here's 1000 jpeg pictures of me as raw data, render a hologram of me saying 'scotty beam me up'"
The display hardware tech would be pretty wild. I think it could be done but it would require a minimum of 1980s nanotechnology hype. Like DLP but using individual atoms not "large" silicon mirrors.
In summary the MVP for digital photography required early 1990s hardware, but the MVP for digital holograms requires a LOT more than 2020s hardware. Maybe in the 2040s, 2100s, who knows.