(2) Do expect to see some scrambling and additional consolidation.
(3) Chain bookstores are obviously becoming a lot less common. A while back, I saw a web page with pictures: "Let's go to the record store." "Let's go to the video store." "Let's go to the book store", and the headline, "2 down, 1 to go".
(4) It has become a much easier world for small publishers including self published authors. Anything ending in -er is a _comparator_. Know what it is easi-er _than_. It still isn't easy. And it may or may not be cheaper.
(5) Books -- pbooks or ebooks -- will be mostly ordered online (and probably mostly ordered from one vendor in particular). Those books -- pbooks or ebooks -- will be fulfilled primarily by Ingram (<-- I'm really shocked by this. _Really_ shocked. The 800 pound gorilla in the room isn't supposed to be _literally_ invisible. I didn't even dig into their textbook initiative.)
(6) If you work for a printing plant that makes books, and that plant isn't run by Ingram Content Group, you should be worried about your job.
IMO, YMMV, etc.