It could be useful for car-to-car data sharing, too. And behind the scenes, blockchain should be useful for vehicle ID (such as tracing stolen cars or collision histories) and bolstering the supply chain.

The move is undoubtedly super-trendy, and there's no firm timeline for when any blockchain technology might show up in cars. However, this could have some very tangible real-world benefits. As there would be fewer (if any) gatekeepers, this could reduce the cost of the services you use without compromising on security -- a trip in a self-driving taxi might be slightly more affordable.