it turned out that there was something terribly stressful about visual telephone interfaces that hadn't been stressful at all about voice-only interfaces. Videophone consumers seemed suddenly to realize that they'd been subject to an insidious but wholly marvelous delusion about conventional voice-only telephony. They'd never noticed it before, the delusion... ...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-exagerrated-facial-expression type of conversation with peoople right there in the room with you, all while seemingg to be right there attending closely to the voice on the phone. And yet 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.

David Foster Wallace