I mostly agree with you, but with one exception: I'm a bit of a history buff, and I'm not altogether looking forward to a future where all of the history texts are alterable, and nobody owns previous copies.
I wonder if this will increase the number of people that sha1 the books to see if it has been tampered. maybe have a distributed system that votes for the correct hash. Or you could have a canonical repository like the library of congress.
History texts for what? Past histories will remain in print form, and new revisions to them will still be published in journals and such. History from now on is going to be radically changed by the giant primary source called the Internet and its offspring. I think you're looking at it on too small a scale.
