Google remains the default search option in Safari 6 (just released this week), along with iOS 6 (in development). The only change of note here is that on iOS 6, the search box simply says "Search", instead of the provider (Google/Yahoo/Bing).

iOS 6 is moving away from using Google Maps, so that Apple can add navigation, vector based maps, and other features missing from the iOS platform. No confirmed reason has emerged for the change, and speculation is all over the place. From public statements in 2009, Google intended to bring the new features to the platform, but never did.

OS X and iOS continues to support GMail, contact and calendar syncing. YouTube video uploading is also still in a number of places in both OS X and iOS.