I might be wrong, but in my imagination this would be awesome, offering nearly limitless possibilities for disruption. For example the adoption of open-source textbooks in schools would be much easier, academic research in some countries would really benefit from easier access to materials.
I think there is no question that this will be technologically feasible at some point in the future. The question is, if it happens and when. I hope it happens as fast as possible and judging by the development of the ebook world from 1990-2007 and 2007-Now, Amazon is by far more beneficial than the traditional publishers in this regard.
Certainly a monopoly is never optimal, but let's worry about that once the future has arrived. There is always antitrust law. Until then, I hope Amazon (or Google or Apple or ...) achieves as much marketshare as possible and pushes the development onward.