Again, stereograms are not holograms. I dream of one day a display that can simulate/stimulate the adaptation of the lens which AIUI is the only thing missing from stereograms being full 3D. Holograms are really full 3D in that they respond to all senses of 3D, it's just they're usually so small that you don't generally get such an expansive subject than you notice it (I recall seeing a lifesize skull in one in some museum, and there it was pretty noticeably different to common all garden '3D' these days)