General Motors has shown of Cadillac's next gen, completely Linux based In-vehicle Infotainment at CES. Codenamed Cadillac User Experience (CUE), the UI looks looks pretty smooth and streamlined.
Check out the video below.
CES Coverage from PC World (Footage ends at 1:20)
Linux based IVI's are nothing new. Other than some custom Linux builds, Android is being rapidly adopted, Meego has one and now Canonical has also been announcing partnership with many companies for Ubuntu IVI (based on Ubuntu Core tech).
Ubuntu IVI Remix Beta was released few days back which is currently demoed at CES. However not a single image or video is available on the web. Looks like Ubuntu TV is the culprit.