Here's one thing that you neglected to mention about e-books: They cost almost nothing to publish.
The cost almost nothing to publish, but the used price is not a question with ebooks. Sometimes used books are priced at a percentage of the original cover price. Since I like old books, and paperbacks have the same content, I've bought books for a dime.
It means a lot of rubbish makes it through, but a lot more good authors will get published.
This will mean that instead of the publisher determining whether you know about an author, it will be advertisers or some similar type of middle man.
With paper books, I guarantee, that over the past hundred years millions of manuscripts became forgotten, because of the printing costs.
In the next hundred years, billions of works will be forgotten because no one cares about them. That will include ebooks. Even if they are still recorded in some universally available library, a small percentage of those books will actually be read.
I am not particular to the format of "the book". It is cheap and durable. I also like that it allows me to actually SEE a lot of my knowledge/entertainment-I can see the spines of lots of my books. It gives me a sense of comfort that I don't get from flipping through a list. I look forward to a future where that knowledge/entertainment is easier to access. But, it's not here.