It makes sense for connecting long range access points if the price is low enough per point to beat traditional (higher throughput, but typically shorter range) wireless methods.
1km - 2km range is certainly impressive. But even incremental access events can exceed 50 kb/s (6.25 KB/s). If data can be structured to send over a period of a few seconds, then there could be some niche applications that make sense.
In the video, they mention networked sensors can be buried. That would be an interesting perimeter intrusion security application.