Google has announced that the new Android KitKat operating system will begin rolling out to Google’s own tablets starting today. The rollout process will likely be completed over a period of time. Android 4.4 will be reaching the Nexus 7 (both last year’s model and this year’s new model) and the Nexus 10. KitKat brings several improvements to Android, including changes to Google Now, SMS integration with Hangouts, and general performance enhancements. Google says KitKat for the Nexus 4 and cellular-enabled Nexus 7 is coming soon.