Seriously? E-books are going to make everyone stop reading because now we can't use our book covers to passively brag to people on the subway how cool/smart/alternative we are?
On the other hand, maybe someone can make a quick buck by selling rewritable/removable "Hi, my book is ________" stickers for the back of kindles.
Just slap a screen on the other side! (God, you know someone is going to do this eventually.)