It's just a small update, about 60 MB. Bumped the version from D80010d to D80010o. Still 4.2.2. From what I could see, the update added 'Play Games' app. It probably fixed the over-sensitive touchscreen too, but I can't say for sure.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?