The recently announced iPhone 4 includes a feature called FaceTime; it’s wifi videophone functionality. In Infinite Jest, David Foster Wallace wrote that within the reality of the book, videophones enjoyed enormous initial popularity but then after a few months, most people gave it up. Why the switch back to voice?

The answer, in a kind of trivalent nutshell, is: (1) emotional stress, (2) physical vanity, and (3) a certain queer kind of self-obliterating logic in the microeconomics of consumer high-tech.

First, the stress:

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.

And then vanity:

And the videophonic stress was even worse if you were at all vain. I.e. if you worried at all about how you looked. As in to other people. Which all kidding aside who doesn’t. Good old aural telephone calls could be fielded without makeup, toupee, surgical prostheses, etc. Even without clothes, if that sort of thing rattled your saber. But for the image-conscious, there was of course no answer-as-you-are informality about visual-video telephone calls, which consumers began to see were less like having the good old phone ring than having the doorbell ring and having to throw on clothes and attach prostheses and do hair-checks in the foyer mirror before answering the door.

Those are only excerpts…you can read more on pp. 144-151 of Infinite Jest. Eventually, in the world of the book, people began wearing “form-fitting polybutylene masks” when talking on the videophone before even that became too much.