The challenge that Android faces is that multiple versions of software/hardware are available to purchase at the same time. While Apple only has one version of the iPhone in stores.
I hope Android succeeds to keep Apple innovating and honest.
Android's challenge vis-a-vis the iPhone will be that Google doesn't know a lot about consumer electronic devices, and the wireless carriers don't know a lot about consumer software. Apple is among the best at both.
I hope Android succeeds to keep Apple innovating and honest.