There was a column in the New York Times magazine this week by Virgina Heffernan talking about the difference between a "regular" book and an ebook.
Specifically, she was talking about their differences, and how her small son said a book on the computer is "more like a movie or a video." A book is that thing with covers and paper pages, that you hold in your hand and turn. An ebook, especially if its interactive or has links to other information, is not the same thing. Or to use my own example, a blog is like a journal, but it's not exactly the same. (For one thing, it's public, not private.)
What else could you call ebooks, which have the same words as the paper edition?
I like etexts. According to Mirriam-Webster, text means "the original words and form of a written or printed work (2): an edited or emended copy of an original work b: a work containing such text."
Sounds like an ebook to me.
However, etext does have another, more specific meaning (as a Google search revealed). Apparently it also refers to text in ASCII character encoding.
I like etext and would actually prefer it. Too late, though. I think the term "ebook" is here to stay, no matter how many bells, whistles, links and interactive frills are added.