According to a recent article in the Wall Street Journal, Audi is about to announce an Android based in-car information and entertainment system with Google, at the Consumer Electronics Show (CES) in Las Vegas starting tomorrow.
Google is apparently entering the area where Apple has been active for a while: they announced the development of the "iOS in the Car" at WWDC, a developers' conference in June. They have already teamed up with major car manufacturers, such as BMW, Mercedes, Honda and Nissan. Apple's system will allow smarthones to communicate with the appropriate in-car systems.
While Apple's platform will need an iOS device to communicate with the car, the project of Google and Audi will have Android and the apps run on the car's hardware, accessible to the driver and the passengers. Thw WSJ article suggests that a 4-5 year development plan will soon be announced detailing the introduction timeline of the new system.
While details are not known yet, we can surely tell that 2014 will see the world of cars as the new battlefield in the war of Android and iOS.