The latest iOS 10.1 beta includes the promised portrait mode for the iPhone 7 Plus. I think everyone was pretty surprised how quickly this feature made it into the betas. Several people have published example photos including Matthew Panzarino and MacRumors. My favorite example is Jason Snell's cat. Jason posted an image that rotates between a standard and portrait enhanced picture of his cat. This shows off the strengths (and limitations) of this software feature. Pay particular attention to the cat hair along the edges.