in the long term, the book stores go out of business now its harder to find interesting books.
Look at Baen's model... the first few chapters of all of their books are available for free, all on-line, all trivially easy for you to browse and sample, at no risk, wherever and whenever it's convenient to you. For that matter, they offer full novels from their top authors for free. So you can read the first book of a 15-novel series at no cost, hooking you for the other 14.
How can book stores, with their limited shelf space and immobility, compete with that?
Of course, that's Baen, not Amazon. Because Baen is a publisher, they have the freedom to do things like offer the first ~50 pages free, while Amazon has to obey the publishers' rules. But in a world where browsing bookshelves is gone, Baen's approach, or something like it, will be necessary to generate sales, so it will be done.
Just because you're accustomed to one way of finding good reading material doesn't mean it's the only one, or even the best one.