Indeed, books themselves were a radical innovation and departure from scrolls. The binding was a major technological breakthrough that allowed massively larger amounts of information to be stored and referenced much more easily. Because scrolls had to be spread out and rolled up as you moved back and forth through them, info retrieval was laborious, and texts were often broken down into collections of scrolls for brevity to mitigate this. Once that happens, things like losing them gets easier. Books pretty much brought as much content as you wished in one unit, with the ability to access any portion of the content with comparatively lightning speed. Ereaders are just another innovation in a long line of innovations for consuming the written word. I find they offer several advantages over paper, as well as some disadvantages of course. But I find I'm reading more now than ever because of them, and have access to worlds of context that I didn't before when reading various volumes.