The novel is an invention, one that was engendered by technological changes in information display, reproduction, and distribution. The cognitive style of the novel is different from the cognitive style of the legend. The cognitive style of the computer is different from the cognitive style of the novel.
Computers want you to do lots of things with them. Networked computers doubly so — they (another RSS item) have a million ways of asking for your attention, and just as many ways of rewarding it.