How serious is Google about its completely autonomous cars? Serious enough to have spun off a company named Google Auto four years ago. The fact that it did so rather silently does show how cautious it is with the venture. For now, the subsidiary only functions as a legal entity to that is held responsible for all of Google's self-driving car paperwork, especially in case things go awry. There is nothing, however, that would prevent Google Auto from becoming a company that will sell these cars in the future, should it ever reach that point.