I'm with mbreese in that I still don't see how having an external intermediate between the headphones and the phone enables this anymore than having an internal intermediate between the headphones and the rest of the phone.
That said, this is only true as long as it's still a 3.5mm plug for the headphones. If headphones start directly integrating with the new port, this equation drastically changes.
That said, this is only true as long as it's still a 3.5mm plug for the headphones. If headphones start directly integrating with the new port, this equation drastically changes.