A small correction to the book description: many, many factories continue to produce their own electric power, nearly all using coal-fired plants, with fuel oil the next most popular. If you're a high-volume users, it's cheaper and more reliable to generate your own electricity. Check it out (auto plants, for example, and the Miller Brewery in Ohio).
Anent this book's theme, I have to say that it's a bit early to be saying that everyone is jumping on the plugging into the Internet for computing resources. This is one of those ideas that's being pushed because it's different--with the hope that it will become a self-fulfilling prediction. Not likely, because anyone capable of linking to the Internet already has a considerable computing resource. A sort-of, "This would be cool if it happened--I'd better talk about it, just in case."
Going onilne for information is another matter--and it's nothing new. It goes back to 1965.
--Michael A. Banks