Digital media and digital rights is a very strange world. You really don’t own content any longer, you rent it (although that $9.99 for a book gets prorated over the rest of your remaining life).
I don’t think this has been tested yet in an estate situation yet.
As an author who’s published books through digital media, I don’t believe we’ve got a real handle on the implications of this long term.
It’s worse for video games.
I’ve been telling people that for years. That is why I buy real books and DVDs when possible.