The big publishers are going to die.

The real major expenses for publishers are the Manhattan offices and other perks, like hiring English lit majors at 80K a year to do proofreading any decent high school grad could perform for a few hundred bucks per book. (Also, an established author can easily crowd source a book's proofreading to a small group of fans. I was part of such an effort recently. We produced an almost perfect draft in less than 24 hours in terms of correcting basic text errors and continuity issues.) The big publishers are going to die. It's that simple. There is simply no reason for them to exist any more. Many small agencies will emerge from the wreckage and earn their keep with meaningful service with a low overhead. A home office in the suburbs is just as good as a Manhattan skyscraper for this purpose.