Its possible that we may run into headphones that are hardwired with a usb3 jack and then use a breakaway plug for the headphone jack.
One of the biggest problems I see, is that Apple itself is inconsistent in ther own so-called movement. If we're truly going to replace the headphone jack with another standard that will become just as ubiquitous, then it should be just that.
Apple then, should have USB-C on the iPhone and iPad, not their proprietary lightning port. It's even more obvious, with the fact that they clearly voted for USB-C on the MacBooks.
But there's the problem- none of these big companies, least of all Apple is really interested in simplifying things for the consumer and making a new standard that benefits everyone. Apple will push lightning, others USB-C, and (I fear) others still something else.
What a freakin' mess it will be if eventually you go to buy a pair of wired headphones in a post headphone jack world, and it'll be some dumb split of "Opps, nope, I need an iPhone compatible set of headphones, not the other kind! Oh but they don't have the pair I want in anything other than Samsung compatible. Oh, here's a nice pair in USB-C... but that's on the way out, now everyone must switch to USB-X... unless of course you need a brand-compatible pair...."
Eech. What a mess. And it won't surprise me to eventually see it something like that.