Isn't this just RADAR applied at higher resolutions and indoors? I'm sure they've done some really interesting stuff if you dig deep but this doesn't seem like "Wireless" as much as it's transmitting and observing radio reflections[1].
I wonder how well this technology would work in the real world. There will be a lot more interference and random, unexpected obstacles than in a lab environment.
In the end it's all radio with all it's pluses and minuses.