Modern technology should make printed books obsolete, but they aren’t. If you really think about it, modern technology should make e-books obsolete, but they aren’t.
Is it mere habit that forces readers to enjoy reading in a strictly linear fashion, with nice little bookmarks to keep them from losing their place? Will a day ever arrive when people will bounce around the internet, reading at a frantic pace and soaking in random facts and figures with no concern for chapters and structure?
If that day ever does arrive, there will no books, electronic or otherwise. There will only be writers and readers and websites. It could happen.