I mean that the jack will remain the default connector headphones regardless of what the iPhone or any other phone does, since headphones have other devices to

I mean that the jack will remain the default connector headphones regardless of what the iPhone or any other phone does, since headphones have other devices to consider. Will there be Apple-only headphones with lightning conenctor? Sure. But any pair of serious cans will be expected to work on any device and that means it will use the headphone jack. You'll simply need an adapter to use them with mobile devices. > Plus, how often do you see an iPhone plugged into an AVR? I'm talking about the headphone's connector.