Today the feature of not being a second device outweighs almost any other camera feature.
// I love photography, have top of the line Nikon pro gear, but the iPhone 4S ruined my enjoyment of lugging that gear around. This summer I picked up a Sony RX1 which is an astonishing full frame sensor in an amazingly compact body to solve that, figuring I'd be willing to carry something small, and that, frankly, the cost would compel me. But truth is, with the iPhone 4S, pictures of everyday things are "good enough" that the inconvenience of the second device still has me leaving it at home. Convenience is a compelling feature!