Apple's "There's an App for that" marketing is certainly demonstrating the features and capability of the iPhone, but if you think back to the iPod it had far fewer features than a lot of other players (no fm radio, no recording, fewer buttons) and still tremendously outsold everything else on the market. The ads showed people dancing around listening to music, which could have just as easily been used as a product demo for any other music player.

I wonder if it was that they got the few features they chose to implement so right that all the other players seemed broken (most notably integrating with the biggest online music store on the planet). It could also have something to do with the feature of being stylish.