Iterate and update. That's the mantra of the smartphone world these days. Where radical design changes between generations of phones might have been commonplace just a year or so ago, most manufacturers are sticking with designs that work and iterating on them with each generation. You can see that in Apple’s iPhone 5S, which looks exactly like its predecessor. Or Samsung’s recently announced Galaxy S5, which, lo and behold, looks almost exactly like last year’s Galaxy S4.