The Portrait Mode
The iPhone 7 plus comes with two cameras and using both cameras for the same time, Apple create an image map for masking the object in the foreground. They called it Portrait Mode, because the effect is very common in portrait photography, because the look of the photos is much better if the person is separated from the background. But you are not limited to use this mode on people. The fake Bokeh does work on things as well.As you can see, the object is very well detected and masked. Sometimes you will notice that some details like hair is gone in the final image, but if you will not look at the photo without this fake bokeh, you will not recognize it.
Separating objects with the technique is great. Your images will get a much better focus and the bokeh does work very well. I think loosing some details are worth the price.
Course of sharpness
Even simple things will get interesting if you shoot them with the Portrait Mode. It is amazing how well this does work.I am surprised how this faucet is separated from the background and how good Apples software recognise the objects in the foreground. I think this photo is not very easy for this, because of the background with all the structures. But it works very well and the result is good. You can notice some "glow" around the faucet, but it is still ok. This 100% crop shows you how this detail looks like.