Bookshelves are certainly not going to become obsolete at my house. For one thing, I have tons of books that are not likely to become available on Kindle, ever, and besides, why would I want to buy them for Kindle if I already have them?
Besides, I like physical books better. Right now, I'm buying a lot of books for my Kindle, but they're mostly older books, otherwise unavailable unless I was lucky enough to find them at a used book store, and they're very inexpensive, thus I can afford more books (plus, unlike the used books, supposing I found them, and unless they're very old, the author gets a royalty). Still, for certain books I'd go for the print edition even if it was significantly more expensive.
Besides, I like physical books better. Right now, I'm buying a lot of books for my Kindle, but they're mostly older books, otherwise unavailable unless I was lucky enough to find them at a used book store, and they're very inexpensive, thus I can afford more books (plus, unlike the used books, supposing I found them, and unless they're very old, the author gets a royalty). Still, for certain books I'd go for the print edition even if it was significantly more expensive.