Why do ebooks often mimic the layout of the printed page?
I was recently editing a novel destined to be published primarily in e-book form, and made a list of pre-press instructions, to be followed when the final text is agreed upon. Some of these instructions were only needed *because* the text mimics the printed page, sometimes to the extent of having columns and fully-justified text. All the e-books I've read use pages. The text is laid out more or less like it would be on a printed page. Why is that? Why not use scrolling text? There are some advantages to laying out text like this: White space at the end of a chapter is a powerful indicator to the effect that *we're done with this bit*. Text looks professional and classy when it's laid out on a page. Why is this done? Is it just because users expect it? Or is there a deeper reason?