The viewscreen on Star Trek (TNG and onward) had this, and it was a cool feature that was so subtle that a lot of people who watched the show missed it. When someone on the viewer was shown from a side-angle, the perspective was correct, and it looked like you were viewing them from the side (as opposed to just having the same flat image for everyone). Here is an example of this:
In Star Trek Voyager, the "behind the viewscreen" was the same as the holodeck gird. It makes sense that if you have the technology to capture fully rendered 3D from a camera (for use in a holodeck), that you could use that 3D image for communications more effectively.
Anyway, cool to see that this is actually being worked on and how far along it's come. Will definitely be interesting to see where this is at in 400 years.