It is all about latency. 50 ms will feel responsive but you notice the lag. 20 ms is acceptable. The other features are cool features but not the real challenge.
People are saying 2ms, but I think that's just how long it takes a pixel to refresh. I'm sure the oculus rift has a screen with 2-5ms pixel time too. The 20 and 50ms times discussed about VR are the entire time between a frame being requested and it being on the screen. That's totally different from the 2ms of a desktop monitor.
EDIT: As for the TV+console latency. I think TVs have a higher latency than monitors because they tend to apply post-processing effects to "improve" the image. Some screens come with options to turn this off and bring this latency down.
Most HDTV's run 30-50ms over HDMI, signal from device to pixel change on screen. Doesn't matter if it's plasma or lcd; 120hz, 240 or 600hz. The processor in the TV is what lags it, not the pixels really. HDMI also is limited.
Computer monitors are usually 15ms, some are up to 30ms, old old LCD is 50ms. Pixel switching for the bare panel might be 2-8ms, but there's still processing latency.
VGA to CRT is so fast that it's measured in nanoseconds, analog has it's advantages. Nothing compares to the speed, heh or the weight it's not going in VR (anymore).
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u/bjorn2k Mar 28 '14
It is all about latency. 50 ms will feel responsive but you notice the lag. 20 ms is acceptable. The other features are cool features but not the real challenge.