RE: eReaders vs. Books?

Only if you think to do that while you’re reading. Once you’ve gone a certain number of pages beyond — and you think to look back to the place where you visually remember it being (1/3 of the way in, 1/2 way, whatever) you can’t do that, because you can’t “see” the book as a whole easily. It’s been improved through the slider at the bottom, but still not as easy as an actual book to flip back and forth.