I am a librarian considering a career change because of this. Eventually everyone will be able to stream/download every sort of movie, tv show, book into some sort of digital device. No need for a physical copy of anything eventually. A library would be nothing but maybe meeting rooms with computers at best, if towns would fund such a thing. But it would be awhile before everyone is forced to switch to all digital.
The flip side is that it makes me very nervous if everything is digital. If you break the thing you download everything onto, or if there becomes yet another digital format and everything becomes unreadable, or how to switch what you already own onto the newest and greatest thing. I worry about having nothing to "show" for all that investment.
I think this point struck home when I was watching my mom do genelogy research with old family photos from the past century. I realized we have hardly any real printed photos of my nieces and nephew (her grandkids), since they are all digital. How would that information survive later on? All of our photos would probably be stuck on some long-abandoned laptop or such, probably unreadable in some archaic format. It's something that got me thinking, that's for sure.
As for DVDs, I wish they would invent movies on a flash drive type device. It's would have a solid casing, and be durable and can last longer. At our library, we are constantly throwing out DVDs that get scratched and unreadable after a few uses. They are too fragile, and I hate seeing all that money wasted on a flimsy technology. Video VHS cassettes were 100% more durable.
I think I still want to own a physical copy of most things I buy. I don't trust that technology will always be on my side.