I can fully understand your sentiment, and to some degree emotionally connect with it, but rationally: my entire bookshelf of computer science and literary classics has gone untouched since my initial read through the vast majority of books.
I keep looking around and I'm not sure that I'm happy with the "ownership" aspect of books, or a lot of stuff in general. (Having moved three times during the last six years, moving books is an awful experience).
This is probably an expression of what I've been feeling in general as of late, but I am extremely happy with the "subscriptionification" of media that's been happening. Spotify's huge library is a net win for me, as opposed to collecting albums for them to just collect dust. For me, revisiting what I used to listen to in high school by over-hearing someone's playlist has a far stronger emotional reaction than revisiting it by walking past a bookshelf.
Regarding stuff disappearing ten, twenty, thirty years from now: my experpience has been the opposite. The Internet has been getting better and better and archiving content of yesterday, and has provided better and better access to it.
My personal lean has been to own less stuff in general, which includes books, music and media in general. So needless to say, I'm pretty excited about Kindle Unlimited.