HTML is not just one output format among many; it is the format of our age…
We have a worldwide communications and distribution network where you can publish anything you want and – if you can manage to get anybody’s attention – get near-instant feedback. Writers just 20 years ago would have killed for that kind of feedback loop. Killed!
Some of Mark Pilgrim's insights into the future of book publishing, as woven into this article about his workstation setup. (Related.)