I'm not sure if I like the iOS type of features in this. :/
I think the ones we see in ML (iCloud docs, notifications) make more sense than what was added in Lion (e.g.: Launchpad)
My main concern with the iOS-ification of OS X is the sandboxing requirements to get into the Mac App Store. That will hobble some current MAS apps
And since only MAS apps are allowed to use iCloud, it creates a potential dilemma for some devs who want to balance some features vs the convenience of iCloud syncing.