Walt Mossberg: How Apple Gets All the Good Apps - Walt Mossberg - Personal Technology - AllThingsD:
"Apple tightly controls its software and hardware, and is fiercely competitive in battling its rivals, especially in the mobile market. And yet, while the company never creates apps for anyone else’s mobile system or device, each of its major mobile-platform foes — Google, Amazon and Microsoft — make many of their apps available for Apple devices. That makes those devices the sort of Switzerlands of the mobile world.
If you buy an iPhone or iPad, you get Apple-written mobile apps and services like Siri, iMessage, iWork, iPhoto and FaceTime, which aren’t available on other phones and tablets. But you can get first-class versions of competitors’ official apps." ...
It's good to be king...