Google has updated their core Play Services to version 4.1 which includes a handful of nifty new features. They’ve added in turn-based multiplayer for Google Play games with support for up to 8 players and a new transition splash screen for when games ask to connect to Google Play. Developers will also now have access to a Google Drive API which they can use to allow apps to read and write files saved to Google Drive so apps and programs can remain synchronized across devices. That’s something that will definitely take the headache out of switching devices in the future.
There are also some minor tweaks, including updates to Google’s Mobile Ads SDK and improved Google+ integration. Nothing major in this update, but there are enough cool new tricks to stay interesting. Like all of Google’s new updates, this Play Services update will likely roll out over the next few weeks to your devices.
source: Android Developers Blog