It doesn’t exist (yet?). But, this is what I would like to see in terms of a physical, electronic bookstore. I think it’s important that a physical place exists where readers can come together to look over books. Perhaps this will be the future of libraries as well. Instead of rows of shelves of physical books, there would be rows of shelves holding digital displays for each author. The display would flash through the book cover of each author’s work, cycling its way around with interactivity to allow for searching or faster cycling.
Patrons could wander through and see the books on the shelves, able to browse authors nearby, and still preserve the feeling of a bookstore, even if the books themselves are ephemeral files on an electronic device.