Because they aren't holograms. A hologram is "a recording of an interference pattern which uses diffraction to reproduce a 3D light field" [0]. This is somethin

Because they aren't holograms. A hologram is "a recording of an interference pattern which uses diffraction to reproduce a 3D light field" [0]. This is something completely different. [0] https://en.wikipedia.org/wiki/Holography https://en.wikipedia.org/wiki/Holography