Automated transport systems/Delivery drones
Cargo ships can carry goods from port-to-port, but these leaves the "last mile problem" of getting them from the port to the doorstep. An exciting technology that is currenlty emerging is autonomous flying quadrotors. These are small, lightweight flying robots that are capable of very agile flight. The technology has progressed in leaps and bounds in recent years, as seen in this prototype from MIT.
Such flying robots are often developed for military and surveillance applications, but have great potential when applied to the problem of delivering packages. MatterNet is a startup company working on making this a reality. They are focused especially in regions with inadequate roads. The MatterNet Vision video explains more.
Several open-source hardware flying drones already exist: Aeroquad, MicroKopter and DIY Drones
Combined with automated logistics software to control the robots, this could create a delivery service that operates almost invisibly, without noise or congestion, uses a tiny amount of energy (solar-powered charging stations could readily meet the energy needs of the drones) and no labour at all.