Fascinating take by Stu Maschwitz on the iPhone 7 Plus' Portrait mode, coming with iOS 10.1:
So don't ask if Depth Effect is perfect. A better question is if its failures are distracting. And I have certainly taken some test photos where they are. But the funny thing about test photos is that there's often nothing worth photographing in them, so you just stare at the problems. In my own testing, whenever I've pointed Portrait Mode at something I actually care about, the results have been solid.
So back to the question of whether we should care about a fake blur applied in post to a telephone photo. When I tweeted the above shot, someone replied with a reasonable question: wouldn't I love the photo just as much without the effect? I replied no, and added:
Composition matters, and focus is composition in depth.