question about Hologram.

Yes Holograms are available, but you don't find them everywhere. nowadays they are used in some movies. They are typically used in security systems to detect movement of objects.

Yes it is available but it is only used by large companies especially the entertainment production companies producing those 3D animated films. Others are using Holograms as well to design buildings and new technological inventions. Owning one of this complicated technology will cost your millions or even billions of dollars.

The following describes an initial evaluation of synthetic dynamic holograms, that is, holograms that reconstruct 3D virtual objects and change (smoothly) as the observer moves. Additionally the holograms are full colour when illuminated with white light and can be created at large scales. Holograms have the advantage over other computer based stereoscopic techniques in that no glasses are involved, for this and other reasons there is no eye strain. They have the advantage over lenticular and other autostereoscopic projection systems in that they can be much higher resolution. In addition the above traditional approaches to stereoscopy have by comparison a very small number of points of view that limit the viewing flexibility. Of course the disadvantage is that they can not be generated in realtime (yet and into the foreseable future). However this is slightly mitigated by the dynamic nature of the holograms (holographic panoramagrams) presented here, that is, they can encode a (short) animation sequence that is revealed by the observer moving to a different locations. This "animation" can be both discrete or occur smoothly. it's expensive as of now.