Is it really like iOS though? They way i see it they want to unify OS X technologies across all platforms.
-Notifications on a desktop makes sense (Growl already did this).
-Integration with iCloud is simply the future.
-Messaging integration was long overdue. It was starting to fragment (iChat, Facetime, iMessage)
-Launchpad is just an app browser and you don't even have to use it. Ditto for scrolling, gestures etc.
I'm more worried with the direction MS is taking with Windows 8 as it seems they are actually trying to merge the desktop and mobile platform right down to the UI. Whereas Apple are just streamlining OS X, bringing useful mobile features into the desktop, and integrating with the cloud.
Granted it hasn't been error free but overall...
Can't say i really have too many objections.