Listening to someone from BMW talk about the features that AWS enables for their cars* and all they came up with was: Remote door locks and remote climate control. Features that have been widely available for a long time without any cloud anything.
Oh, and fast over-the-air updates. Which they wouldn't need if they weren't trying to cram cloud computing into the cars.
* I mean, just the idea that a car needs cloud computing support makes me barf.