Physical books are becoming just a collection. Even though I haven't personally read any e-books, it's easy to see why people would prefer to read from their tablet, which has access to thousands of books, instead of a physical book that takes more space than the tablet. Maybe some day owning books is as cool as owning classic cars :)
You're right, and I agree with you. But somehow I feel sad if the physical books shifted by e-books. It may be like losing a friend who has been with us for a long time.