Why Apple Delayed Leopard for the iPhone

Ernest DeFarge writes "Apple recently announced that they've pulled several key programmers from the OS X 10.5 "Leopard" and assigned them to the iPhone in order to get it done on time. In doing so, they delayed Leopard for 4 months. Does that mean that the iPhone is more important to Apple than Mac OS? Or is it just capitalizing on the current state of Apple's fanbase?"