@allenJo - I think standard fare holograms have become somewhat passé actually. The technology for photographic hologram projection has been around for awhile.
What I prefer is video holograms. I understand that you can buy a complete hologram projector system that will create holographic video images.
I have no idea how the system works, except that it probably uses the same concepts taken from holographic films. In this case however it treats each frame of the video image as a separate film to be treated so that it can turn it into a holographic project.
The end result will be something like “Princess Lea” from the Star Wars movie, the scene where she appears as a holographic video in which she makes her desperate plea for help.