Well, over here (Sweden) I'm guessing authors would protest loudly if anything like this would be implemented. Over here the author gets a couple of cents (or whatever the amount is) every time a book is checked out from a library. They want their books to be read gazillions of times, and they know that it people borrow their books at the library (whatever format) they are likely to pick up THEIR book before others at the airport, in the beach bookshop or wherever.
And, for what it's worth, USA isn't the world and English isn't the only language in the world. Outside of US eBooks ar bought in lots of bookstores that have nothing whatsoever to do with Amazon or B&N or Borders. EPub is the dominating format, so readers supporting ePub will defininately still be the preferred option internationally.