This is a great review of the iPhone 6s camera and summary of its new features.
Marion has bought an iPhone 6s and the camera is a definite improvement when I compare her photos to the ones from my iPhone 6.
Better low light performance and higher resolution are always a plus, but the new feature I prefer is Live Photos. When Apple announced it, I found that superfluous but I changed my mind after
looking at watching photos of Raphaël and hearing him twittering...