iPhone 5 and 6 have hardware and software features, like the 1000-gradient flash, that are unavailable on any other camera. It's one of the best point n shoot cameras on the market.
I have a decent DSLR, and I rarely use it because I rarely happen to carry it. Even when I had a Galaxy S, with a pretty poor camera, I was making much more use of the phone camera than I thought I ever would. The affordances for instant editing and posting are just a world apart on smartphones.