In the book there is a long passage about how video calls were initially very popular, but after a while people realized that with video calls they were supposed to be looking to the screen all the time and how that led to unnecessary anxiety - e.g, on the telephone you could talk on the phone while clipping your nails, on the video it would never happen.

There is also a part where people had to start worrying about their looks on the screen, so that led to a cottage industry of virtual make-up, stand-ins to pose in front of the camera while you could stay away, etc. After everyone realizes that no one is actually in front of the camera anymore, people start going back to regular phone calls.