I always associate the videophone concept with Max Headroom, where the president of ZikZak Corporation used one to glower at his underlings, Big Brother style, from an enormous screen on one wall. Son of a gun, today's corporate meeting rooms have video conferencing setups, replete with a huge screen on one wall, so that use case (there were others in the show) appears to have been bang on the money.

If you're going to argue that we don't really have picturephones, just computers that do video and audio over the network, you should argue we don't really have a telephone network anymore, just a computer network that routes audio, video, and other things. The backhaul for my parents' "landline" is 5G.