As I've discussed before, avoiding the masses and their bland, monotone conversations is one upside to these devices. To me, at least, that's secondary; a bonus. What's the real benefit? I get to listen to music when I otherwise could not. That makes me happy.
When I listen to music, my foot taps. My fingers drum. I tend to sing (badly) along. It takes quite a lot of effort to keep these things in check when in public, and I'm not really all that concerned about a little drumming on my knee while sitting in the back of the bus.
What concerns me, though, is that no one else - let me stress this, not a SINGLE PERSON - that I encounter ANYWHERE appears to be getting any emotional kick out of what they listen to. WHY THE FUCK IS THAT? IT REALLY MESSES WITH MY BRAIN.
I know that it's not that everyone in the world has better willpower than I do. I think these people don't care, and are not paying attention.
I'd rather like to watch graye and hotbeatz and facehead2k when THEY listen to music. They care. They pay attention. I'm sure of it.