The virtual presence tech should be near equivalent to in-person interactions within four years.
Forgive me if your comment was meant as sarcasm, but I think solving even this problem could take more than four years, and it is only a fraction of the puzzle for equivalency to in-person interactions.
I've never noticed anyone doing that when on calls with friends. I have in meetings at work, but there people hide on mute because they don't really want to be there in the first place and are probably off aimlessly browsing the web or trying to catch up on actual work. In the scant few work meetings that are purposeful and engaging, however, I've found plenty of laughter.