It's probably a mistake to call this a prediction. Aside from the stuff about the masks, this actually
did happen when Bell introduced videophones (a few years after their demonstration at a world's fair, where the tech got a lot of press). Internally, Bell blamed the commercial failure of videophone tech on the way that the presence of video changed the environment of social expectations around telephone conversations (as DFW does), & it's likely that DFW was aware of the history of commercial videophone tech, and decided to suggest history repeat itself with an attempted relaunch. (It seems like the real reason Bell's wired videophone tech didn't take off is the cost: because it required digital switching to implement, videophone lines were priced in such a way that the projected sales based on survey data from the world's fair would cover moving the entire network to digital switching; however, between the price of such lines & the cost of the new equipment, it was more than even the business market wanted to pay, & the project was shelved after a year or two. On the upside, supporting this was the excuse for the move to digital switching, which was completed by the late 1980s.)
The author of this piece seems to be overestimating how often people use video chat (or maybe I'm an outlier). I've had video calls with a total of about four people, and haven't had one in the past five years. They've only been for business meetings & cybersex.