Really? Wasn't BT for wireless headphones and headsets built in into the iPhone 4??? Its not like Apple added new things to the iPhone 7. They removed something.
I think they mean in terms of marketing. They aren't going to go... 'hey, we removed that port you guys all hated so much'... they'll spin it in some supposedly positive way, like how the water-resistant aspect improved, or touting how great the new Lightening headphones supposedly are.