iOS: The notification system on Android is certainly an excellent feature. It would be amusing to see how Apple tries to address the same problem. Similarly, Android's replaceable keyboards allow for all kinds of interesting innovation that's closed to iPhone users. Will Apple allow keyboard replacement?

Lion: I'm mostly curious what Apple will charge and whether it will even be possible to buy a DVD. There's some evidence that upgrading from the regular client to a server will happen based on an app-store purchase.

iCloud: The big question is whether Apple tries to go after Pandora. $25/year is cheaper than a high-quality Pandora subscription.