I do almost all my reading on a Kindle now. I occasionally borrow a book from the library if the e-book is more than I want to pay. I'm reading a hardback right now, in fact. It sure is heavy!
I have no desire to scan paper books in order to read them electronically. It wouldn't be worth the time and effort for me. I don't re-read books, so I feel no particular need to keep them once read.