eBooks are great but will never entirely kill off books. Personally I find an ebook to be useless for anything that does not contain entirely text, pictures or diagrams are messed up or just hard to appreciate properly. An iPad/tablet is required for anything with images eg. Technical books or graphic novels (usually as PDF). But none of them will offer the feel of a book. My kids could easily have an ebook but I think the value in learning to love an actual book far outweighs any benefit an eresrer would give them.