[Qwertious]

Paper books have legal value - you have rights to resell it, for instance, that you don't have for ebooks. Until we unfuck those, ebooks will never completely replace them.

Paper books aren't particularly environmentally wasteful - if you buy one extra electronic device (say, an ereader), that basically outstrips the damage of any number of books you'd buy. That might not be relevant to the perception, though.

Books as expensive wallpaper will definitely keep being a thing while dead-tree books are common, but they're fundamentally about conveying an impression, and impressions can change - if ebooks become the overwhelming majority to the point that office decoration is the main point of books, then anyone who sees the bookshelf will assume you're a poser doing it for the image, and thus people will stop doing it. So wallpaper-bookshelves can't exist as a sole purpose of books (probably).