Remember headphones? Those were those things you used to wear on your head and connect to your Walkman so you could enjoy your favorite music without bothering anyone else. Quaint thought, huh?
Eventually they gave way to ear buds, which were more comfortable but really only did half the job- the wearer could hear his music, but people nearby could hear tinny music sounds-- pretty annoying, but remember, ear buds were more comfortable and that's all that really counts.
Here's proof that comfort is all that really counts- we don't use headphones OR ear buds anymore, anywhere, ever. It's much more functional and enjoyable to just crank up the volume and listen through the device's speakers. No more worrying about ear sweat or buds popping out or wires getting tangled. Just watch and listen as if you're in your own living room and you are the only person who exists because when it comes to you and your immediate desires, you pretty much are. That guy five seats over who just wants to read his book or think? He's perfectly free to continue to do so- if the noise coming out of your phone bothers him, well, he can move, can't he? And those other people in the restaurant (like the ones sitting near this particular douchenozzle?) Well, if they don't want to hear HIS device, they are perfectly free to turn up the volume on their own, right?
What? They were trying to have a conversation? Well, that's pretty lame. And not your problem. You've got Unlimited Data, which means you have Unlimited Opportunities to show the world that you're an insufferably self-absorbed sociopath. And you blend in really well with everyone else, because you're much more the norm than those weird people who still wear headphones or ear buds.
Why did we ever even invent headphones, anyway? I just don't get it.