By 'dead' I mean that the number of copies any one book is expected to sell is pathetic compared to other industries. A book that sells 100k copies is doing extremely well, whereas an album, video game, or movie that made similar numbers would be a disasterous flop. Advances, the main value that publishers provide to authors, have shrunk to the point where you could draw a bigger advance (on better terms) at an ATM with your credit card.
I'm hopeful that the democratization of publishing will allow new types of author to succeed, now that ownership of a printing plant isn't a barrier to reaching your audience, and revitalize the publishing industry. It really can't get much worse.