If you've read Steve Jobs by Walter Isaacson, you will know that iOS is built off the same UNIX kernel as Mac OS X. This means that, like Mac OS X, Apple could have given the iPhone more fully featured multitasking than we have previously seen. In Mac OS X, multitasking and fast app switching in the form of Expose and Mission Control have been very popular. This has been emulated in the Android mobile OS and applied successfully. However, for reasons of battery conservation and perhaps even simplicity, Apple has avoided implementing full multitasking and fast app switching on the iPhone -- unt
