The elephant in the room is that UWB positioning is indeed very precise, but only if you have a number of well-positioned beacons with known precise locations working together. The article is all giggly about the rosy future, but having worked with UWB (specifically, the Decawave chips mentioned in the article) I would be much more restrained with predictions. Yes, this is really good technology, but nowhere nearly as easy to use as it seems.

I'd be very interested in technical details: are they using 802.15.4a? Do they use the spectrum above 6GHz?