Goes to show you that software design is everything. Apple's opportunity here is that they can sell services that people want. Having an AppStore and iTunes Store right there without any configuration is so great. This simply isn't there on any Nokia device S60 or Maemo. A few taps and you're in a catalog of 3rd party apps. No dependencies, repositories... or digging in your settings to find some setting to allow apps without certificates to install since nothing is really certified. S60 and Maemo are way behind Apple's delivery platform.