Like many similar startups, Aurora is focused on developing a driverless system rather than producing full-fledged cars. You could integrate its technology into various vehicles, and companies like Hyundai and VW have already pledged to use Aurora software in their cars by 2021. Amazon could use this for self-driving cargo and courier vehicles, reducing its need for human drivers (like it or not) and speeding up delivery times by keeping products moving around the clock.

With that in mind, any development is likely to be a ways off. An investment isn't the same as a partnership -- it signals intent more than action. Just don't be surprised if you one day see Amazon-branded robotic vehicles roaming the streets.