The way I see it, I have ebooks so when I die, my family won't have to wade through piles of books to clean out my home.
I already have piles of DVDs, comics, books I will never get rid of and cloths. I look at my home and say to myself, "do you need all this stuff?" I will not always have a Kindle but I will always have a computer of some kind. So far I have not deleted any of the ebooks that I purchased off Fictionwise or Amazon but I don't see them having a life after I'm gone. Technology is moving quite fast these days. The current business models are having a very hard time of it. They will always try to get the most for what they provide, it's always been that way and the market will either take it or crush them. We can always say we remember when a paperback was under a buck but a slice of pizza was 10 cents and I could go to the movies for 50 cents (double feature). A book is worth exactly what you are willing to pay for it. Only people with a lot of surplus income will pay $25 for a novel in ebook. Most people I know will just go to the library or wait for the reseller market or cheap paperback edition.
I think the old-type publishing houses will begin to go out of business if that hasn't already begun to happen.