There's been a lot of ink spilled over the notion that the iPhone 5 somehow isn't "revolutionary" or "radical." It isn't. It's familiar, but better. That familiarity is one of the iPhone's strengths, not a weakness.
Bigger; better screen; Very elegantly built phone; Incredibly light and thin; Fast new custom-designed CPU
New Maps app needs a lot of work; Letterboxed third-party apps