At a reception in Germany, Elon Musk spoke to a crowd about Tesla’s investment in the German market. Germany is very forward on renewable energy, alternative fuels, and they seem like a natural fit for the Tesla vibe. Especially considering that Germany was the second place market for the Tesla Roadster (behind the USA).
While answering questions about their corporate plans, Musk was asked about developing apps for the huge touchscreen built into the dash of the Tesla Sedan. The Model S currently uses a build of Linux, so porting Android apps over, or running them in an emulator, should be fairly easy to do, and he does specifically mention updating the car’s browser to chrome.
Elon actually takes the stage at 14:47 in this video, and you can skip to 37:20 to hear him answer the question about apps and Android.
I still have some ergonomic and safety reservations about an automobile control surface comprised mostly of a smooth featureless touchscreen, but at least I might not have to learn a new and unfamiliar  UI when I’m finally able to get my hands on a Tesla of my very own… Some day… It could happen… Sigh…