The debut of new Uber driver-less cars in Pittsburgh today has been occupying headlines, but another bit of Uber news is likely to be a bigger story in the long run: Uber announced today that it acquired Otto, a start-up working on automated trucking solutions. Otto, composed of ex-employees from prominent companies like Apple, Google, and Tesla, has developed hardware and software that can be mounted onto existing trucks to put them on autopilot (or something like it). In other words: Uber might be about to open up a war on its longest front yet.