I have been following this for a few months now. This has been undergoing extensive testing by various cargo lines. It has the potential (seems to be coming true) of becoming the next big thing.
We should know how this shakes out within the next 12 months
This idea addresses a shipping problem caused by a huge trade imbalance. I'd rather the next big thing be Chinese factory workers in robot form that could work in America 24 hours a day so there's no trade imbalance. The American jobs would be programming and maintaining the factory robots.