I'd like to add a question of my own if that's ok.
Basically isn't bokeh the blurring of the background in a photo? People have been posting test photos from their iPhone 7's and 7 Pluses already and some of the photos already have this effect depending on the photo. If I'm correct you could get this on the 6S, and especially now on the 7 with the 1.8f aperture, so I don't really understand why this needs to be added?