After taking giant bites out of Apple, Android chief Andy Rubin is apparently sated.

He's stepping away from his fiefdom, according to a blog post by Google CEO Larry Page, to look for something else to do inside of Google.

Chrome and Apps chief Sundar Pichai, who turned down a job running product at Twitter, is going to take over Android too.

One is left to imagine the backstory behind the surprise announcement Wednesday.

The Chrome operating system has started to resemble Android and the Chrome browser has built a sizeable base.

Google bought the open source OS and Rubin along with it in 2005 and Rubin has now seen his creation activated on 750 million smartphones and tablets via more than 60 manufacturers and 25 billion apps downloaded from Google Play.

Page said, "Having exceeded even the crazy ambitious goals we dreamed of for Android - and with a really strong leadership team in place - Andy's decided it's time to hand over the reins and start a new chapter at Google. Andy, more moonshots please!"