I've almost abandoned buying physical copies of albums. I think the only thing I've bought non-digitally this year was Trouble Will Find Me. Never thought that would happen, but given that I can no longer go to a record store and buy music in person, I opt for the instant gratification choice rather than waiting for stuff to show up in the mail. And I do use spotify a fair amount, although that has more to do with not owning an iPod at the moment. I listen to probably just as much music that I actually already own vs what i don't own, so it's probably a little silly for me to give them 10 bucks a month to stream albums I've previously bought. But my phone is only going to hold a small fraction of my music collection, so until I get a new iPod, it will have to do. Plus, I've got the option to listen to stuff I don't own/legally preview before I buy it if I actually like it (and want to be able to hear it when I don't have an Internet connection/don't feel like eating my data plan).
Initially, I was very much opposed to the idea of buying mp3s vs CDs. But it turns out I care a lot less about all the sentimental, ceremonial bullshit of that first listen whilst paging through the lyrics. And I don't give a rat's ass about displaying my collection. Convenience (I can go music shopping in my living room at 4am if I so please), storage (external hard drives take up so much less space than cd racks)--these are much more important. As I get older, I find that overall I just want fewer objects in my life, taking up space into house, potentially having to be packed up in boxes the next time I move, etc. same opinion applies to ebooks, although I buy a real copy when I know my housemate will want to read whatever it is after I do.