I'm still amazed that current video conference doesn't have a "wait to signal" on the UI.

Video conf people, if you're reading this:

  Study what's the regular "wait to talk time" for a face to face conversation - let's assume 250 ms. 
  Measure audio/video latency (from remote capture, encoding, transmission, display) - let's assume 100ms. 
  Add a listening progress bar to video that's filled when someone else speaks un-fills when 250 + 100 ms has passed.
  Add a speaking progress bar that fills when when the person speaks and un-fills when 250 ms has passed.

It's not great or polished idea but I have no idea why this doesn't exist yet. We need a visual indicator when to talk on video conference because our human metrics are not calibrated for it.