"Sony introduced three Linux-based in-car navigation and infotainment devices in Japan. The NV-XYZ 33, 55, and 77 feature 3D map navigation technology, media players, hard drives, GPS, and PC connectivity. And they are based on a Linux 2.4-series kernel."
Given its low cost and open source nature, Linux has always seemed to me to be an ideal OS for most household appliances, it just looks like cars may get there first. I imagine this sort of thing is only the beginning and in the future we may well have autodrive cars that could be Linux powered.
Who knows, maybe in a few years we will all be telling a cybernetic penguin "where to go" !