Mercedes-Benz probably isn't the first name you associate with delivery drones, but it's committing to those robotic couriers in a big way. The automaker has invested in drone logistics developer Matternet, and the two have worked together on a Vision Van concept (above) that would make delivery drones more practical. The electric vehicle amounts to a last-mile launching pad: drones can grab packages from its "fully automated" cargo space and fly a relatively short distance to complete deliveries that would be impractical (or just slow) for a human courier. And when it would connect everyone from the distribution center to recipients, it would manage deliveries that aren't usually feasible today -- same-day delivery at a specific time, for instance, rather than making a best effort.