What you need to remember about 3d projection is that it can defeat network latency, in some case bringing intercontinental one-directional latency under 40ms.

What you need to remember about 3d projection is that it can defeat network latency, in some case bringing intercontinental one-directional latency under 40ms. It can also decrease rendering latency relative to audio and video over IP. Between these benefits, the VR telepresent conversation feels more real, more present. Oh, wait. /s (40ms one-way latency on London-NewYork or LA-Beijing requires beating the speed of light, unless I screwed up my math). Another thing that makes realistic VR unsuitable for telepresence (though perhaps not a problem for "3d holographic projection") is that an HMD makes it much harder for the system to find out what facial expression you have, and so there's actually less information to transmit to your remote correspondent.