But it's not being written down as a book. It's being transcribed on-the-fly. The user can only see the words as they are being read right now. Audible argues

But it's not being written down as a book. It's being transcribed on-the-fly. The user can only see the words as they are being read right now. Audible argues that the critical competitive advantage of a book is to see lots of words per page, being able to flip to any page you want, and to read at the speed of your inner voice. Their feature does none of those things, so it can't usurp the market for books.