It's a solution in search of a problem--like removing physical buttons from the Kindle...the alternative (touch screen page turns) is more high-tech, but not as pleasant.
I'm sure audophiles would appreciate a digital interface for their headphones, but everyone else is perfectly content to use cheap $5 earbuds for their highly compressed audio files.
Yet, we're now supposed to believe that the general public will enjoy paying a premium for new gear that replaces their cheap and perfectly functional headphones?
Just because a technology is old and low tech doesn't mean it's antiquated.