"The technology can measure range, velocity, and angular information; detect motion, presence, or proximity; detect objects, people, and animals; and be used in rooms, houses, cars, and enterprise environments."
It seems incredibly invasive. Can some peeping tom just turn on his WiFi base station to track if the next door neighbour he is obsessed with has a guy over...if she's in her bedroom...is in the shower...you get the idea. Creepy stuff!