Seriously people if civilization ended tomorrow and we no longer had access to electricity, we would still be screwed with paper books. Most people don't know how to forge metal, make paper, create ink, build houses etc... without electric power either. How many people know how to make a candle from scratch and gather the materials to do so?
If we lose power tomorrow, we are screwed anyway.
Moving to ebooks is a good thing. It makes updating content cheap and easy. It increases the amount of information we have access too at the touch of a finger, and allows for many easy to duplicate copies. If everyone has little tablets that have 1,000 of e books on it, just ONE surviving ereader could have more books on it than an entire library of paper books.
Paper books are bad for the environment and EXPENSIVE. The printed encyclopedia is $1,395.00! The DVD of it is $40. A tablet computer is about $500. So an iPad version + a $500 iPad, and it is still less than 1/2 the cost of the paper one. http://itunes.apple.com/us/app/encyclop-dia-britannica/id447919187?mt=8
BTW wikipedia used to be available as an ebook device...http://www.hammacher.com/Product/78632?promo=Electronics-Gadgets&catid=103