It stinks - nobody asked for this and we can use Bluetooth at the moment if we want to.
Ironically, I'm typing this on an Apple MacBook Air... bought refurbished, previous model, lowest spec I could get... and Apple's OS lasted a week before I blew it away and installed Linux Mint instead.
They are good at the shiny, shiny.... but the function of their products has always been impractical. I had to use an iPhone for work (my current phone is a Wileyfox Cyannogen, and prior to that a Jolla running Sailfish... because I hate Google as much as Apple)... and the screen was so white that it blitzed my eyes whenever I tried to do serious work on it when away from the office.
I couldn't even bluetooth a file from the iPhone to another non-Apple device, and the bluetooth file transfer programs in the App store were all over the place, one star, two star, complaints galore... so how the heck the iPhone 7 is going to work with bluetooth headphones just makes me want to shiver. There's going to be more proprietary crap in there for sure, that will mean manufacturers have to hand over licensing money, which the customer will have to pay for.
Practically... I can get more, and functionally better, for less, elsewhere. Apple is just not relevant to my life. Expensive, inflexible, bling that is backed by a company which is really starting to upset its customers (retina screen failures was firstly listed as user damage, before they faced class action)... and isn't innovating any more. For years now, they've been the ones playing catch up, and lately they've not only been losing market share, but their figures have been declining.
This just seems to me, to be a way of wringing more cash out of the faithful, because I can't see them wining over new customers.