Well I would argue that holograms are always a projection, that is you need a reference beam to reconstruct your image beam. But I agree the star wars "hologra

Well I would argue that holograms are always a projection, that is you need a reference beam to reconstruct your image beam. But I agree the star wars "holograms" were never holograms but more 3D point cloud projections. Now you could say they do exist, see e.g. laser light shows, they are just by far not as impressive as the star wars movies.