Re: They haven't since about 2007 (@AC)
If we're discounting (i) the interface (Apple: first to market with multitouch; first mobile OS built from day one to assume a GPU); and (ii) the cost of ownership (Apple strong-armed AT&T into unlimited data when everyone else was charging 50p/megabyte), then I guess you can write off the iPhone. And more or less everything else to happen in computing since at least 1980. Who needs the direct manipulation metaphor if a Computer Science graduate can learn to navigate a highly modal, nested interface on a phone with exactly one font and two levels of zoom using a combination of key presses, dials and a stylus?
Ignoring the good things Apple did for the market just weakens discussion of the many bad. It also implicitly attacks Android. Android has conquered the market by being a million times better than the near-unusable pre-iPhone rubbish. That's why throwing some gestures on top of Symbian and trying to do with development tools what they couldn't do with the OS didn't work for Nokia.