This is from 2015. We're almost into 2017.

- A 4k frame is 3.2 x as much data as the 2160x1200 frame.

- In this case, compression was achieved at 60fps using H265.

- The same spec of equipment should in principle be capable of achieving 60fps * 3.2 = 192fps. That's 5ms latency due to compression.

- Add in the simplicity of many VR scenes - think RecRoom, Windlands... should be fairly easy to compress.

- Audio can be compressed in parallel

"Not possible"?

I disagree, "more than possible two years ago"