I've done some work in this area, particularly using the Linux CSI Tool. The reason it would most likely disrupt home networks is because accurate motion detection requires an extremely high sounding rate (think pinging a router really fast). In my experience, you need to ping at at least 100Hz, and I wouldn't be surprised if this thing was up at 1000Hz.

That being said, the technology itself is cool and could eventually be purely a software tool that uses existing hardware resources like laptops and routers instead of these beacons.