PalmOS Clone?
Remember PalmOS? A handheld touch screen, with icons.
Just add gestures, kinetic scrolling and you have most of the elements of the iphone user interface.
Move the system bar/notification bar to the top and you have a bunch of elements of android notification bar.
Expand the user interface to a larger panel and you have an ipad or android tablet.
The special sauce in the Apple product is the attention to the details in the hardware, and the integration with itunes, which you either love, hate or accept. None of the individual features are new or magic, the "reinvention" is the way it's a converged device.
