I was wondering about this topic for quite some time. I just stumbled upon this article,
This question is not just for estate and inheritance. In one or two generations, ebooks disappear with their owners. There is no longer a physical form to keep for archiving. It is not because of the technology but the fact of non-transferable ownership. Can libraries and museums collect, display, and share digital contents once the writers are no longer alive and the publishers cease to exist? When publishing goes digital, are we handing those issues to commercial companies like Apple and Amazon. If so, these companies are enjoying more dominance and financial success than it is shown on the book.