This isn't surprising at all - that it would be more likely to port code from the iPhone to the desktop OS than the other way around. There are more constraints

This isn't surprising at all - that it would be more likely to port code from the iPhone to the desktop OS than the other way around. There are more constraints on the iPhone - especially memory, so anything that runs on the iPhone should run fine on the desktop, but not vice-versa. Moreover, it may not make economic sense to tune a piece of desktop code to fit into a small bit of memory, but if you have code that was so tuned to run on the iPhone, why not replace the untuned desktop code with it?