The book shelf has my fav books, there are 76 of them, and they together weigh around 40-50kg! In my iPad I have around 3000 books. And they all weigh the same as the iPad does in total. If I want a book off the shelf I have to look really hard at the authors and titles, on the iPad I just search. Books fall apart especially those favorite books, my hobbit has got to be 1/4 study tape!
I never lose my "spot", no dog ears, no need for a light, no cramps or RSI from holding a novel, no tired arms, and if I want I can play ambient music while I read.
So hands down ebooks are awesome.
I feel bad for the books shops loosing so much business, but the authors won't!