I recall when MacWrite, and later MS Office for Windows came out, and all writing seemed to stop. People were playing with fonts, colors, kerning. While they made pretty pages, there was often no intellegible language on the page. The redeeming factor was that the Mac allowed a person with a few thousand dollars to publish quite professional looking product, instead of the tens of thousands previously required.
To write a book you need a text editor. To publish a book you need a page layout program like LaTex. It will print in PDF which most anyone can read or print. You can even sell them. if you want something more than a book, then something more than page layout program is required.
What we are mostly talking about now is how to publish more than a book and how to distribute that more than a book. Amazon already has a method to publish and distribute a book. What Apple is providing is an eBook that, if done correctly, will not translate well to a simple printed book. If we are talking textbooks, for instance, the simple printed book is no longer good enough. We have textbooks, we even have very good free textbooks in many subjects. What we need are more than books so the students can get the words, lectures, and simulations outside of class, and use class time for the modeling of the social interactions that are necessary for learning. Successful students instinctively forms groups, not so successful students thinks that such groups are only for partying or sports.
So I don't see how this is useful. LaTeX is open source and free and a very mature and reliable product. I do not see Booktype opening up any new distribution channels. I am only saying this because the summary started off by citing Apple. What Apple has done is provide a format that will let a writing create an e-book, not simply a book that read on a screen instead of paper, and a method of distribution. As I understand it, the EULA really is not going to effect a writer, since any real writer is going to lay down the text and generate the graphics outside of the publishing application. The EULA only says that the iBook is required to be distributed by Apple. This means that write can create a rich content e-book which must be distributed by Apple, but can also create a traditional book that can be distributed any way. This traditional book could be created by Booktype or Latex or anything else.
Going beyond the book is something that very few seem to want to do. The publishers certainly don't want to make their printing presses and large salary redundant over night. One company that did try this, push pop press, is not part of facebook and is no longer really in the book biz. Apple, as it did with music, sees profit in the disruption of books, and has the funds to not be concerned with the people they are going to piss off.