If the overall carbon footprint is less, then I guess its worth it? I would imagine that they have plans to tether a few of these together, load up the cargo,

If the overall carbon footprint is less, then I guess its worth it? I would imagine that they have plans to tether a few of these together, load up the cargo, and fly it around un-populated areas to build a distribution network. Perhaps tethering them can also mean overall stability and resistance to wind effects, something like an air train. Maybe, a small aircraft can lock-in to the first one and simply pull it along at higher speeds? Assuming they can fly at about 50 MPH, can be automated and can fly day and night with minimal energy consumption, companies like Amazon and FedEx would be interested. Not to mention tourism applications, surveying, etc.