[Azrael]

Not to mention most ereaders that aren't on LCD screens (pandigital and nook colour) are on a screen that's... pretty much digital paper. Same colours and everything. No harder on the eyes than a regular book, and you still need a booklight for it. Being hard on the eyes is nothing.

Also, books needing to be lugged around/whatever, taking up space or anything can be a huge reason people don't buy them. Not to mention the pure COST. But the eReaders do make it a lot more available. Hell you can get books from the library (granted fairly limited) without even having to leave the house. It opens up reading to people who would never normally bother.