A future dominated by autonomous vehicles (AVs) is, for many experts, a foregone conclusion. Declarations that the automobile will become the next living room are almost as common — but, they are imprecise. In our inevitable driverless future, the more apt comparison is to the mobile device. As with smartphones, operating systems will go a long way toward determining what autonomous vehicles are and what they could be. For mobile app companies trying to seize on the coming AV opportunity, their future depends on how the OS landscape shapes up.