Good old traditional audio-only phone conversations allowed you to presume that the person on the other end was paying complete attention to you while also permitting you not to have to pay anything even close to complete attention to her. A traditional aural-only conversation […] let you enter a kind of highway-hypnotic semi-attentive fugue: while conversing, you could look around the room, doodle, fine-groom, peel tiny bits of dead skin away from your cuticles, compose phone-pad haiku, stir things on the stove; you could even carry on a whole separate additional sign-language-and-exaggerated-facial-expression type of conversation with people right there in the room with you, all while seeming to be right there attending closely to the voice on the phone. And yet — and this was the retrospectively marvelous part — even as you were dividing your attention between the phone call and all sorts of other idle little fuguelike activities, you were somehow never haunted by the suspicion that the person on the other end’s attention might be similarly divided.
[…] Video telephony rendered the fantasy insupportable. Callers now found they had to compose the same sort of earnest, slightly overintense listener’s expression they had to compose for in-person exchanges. Those caller who out of unconscious habit succumbed to fuguelike doodling or pants-crease-adjustment now came off looking extra rude, absentminded, or childishly self-absorbed. Callers who even more unconsciously blemish-scanned or nostril explored looked up to find horrified expressions on the video-faces at the other end. All of which resulted in videophonic stress.
There’s more, but you really should read the book. I’d forgotten about this, but it does ring true, doesn’t it? How many times are you really, *really* going to want a video call? For me, the answer is very, very few, and for pretty much exactly the reasons DFW outlines. The man was a genius.