Some people are doing some truly remarkable things with the iPhone camera and apps. You may want to check out the web site, Pixels At An Exhibition. While the iPhone is no substitute for a DSLR (and will not be for the foreseeable future) it is very near a substitute for any camera that does not have a quality optical and/or electronic viewer, and I would include the mirror-less cameras in that category. Indeed, the iPhone can be used by the serious photographer as a painter would use a sketch pad, something to get preliminary ideas down on paper, or computer file. I will continue to buy an iPhone every 2-3 years and a quality DSLR less often but I will never again buy a camera, any camera, that does not have an optical viewer. The iPhone has that segment all but beat.