For iPhone users out there, there is some promise with the iPhone 7 allegedly eliminating the Headphone output altogether... and just going with Digital Audio out via the Lightning port... requiring new headphones etc., etc.

I still wouldn't be that confident about bypassing the typical OS limitations and Sample Rate restrictions that Apple seems to put on all its devices [bar Mac's] these days... so while Digital Out sounds appealing, it might be a forced resampling of everything to 16/48, just as it is on all their devices... time will tell.

-