The biggest difference between an ebook and a paper book? The sound they make when they hit the floor after you fall asleep reading.
@MichaelPryor paperback: thud.
Reaction: "Dammit, I creased a page!"
Ebook: crack...
Reaction: "@#$&!!! Can you even repair an e-ink screen?"
Luckily the Libra H2O is pretty robust... I've tried not to drop mine, though it's happened once or twice.