Interesting. What is the range of this device? If its effective range is anything above half a meter then it would raise serious privacy concerns. I can image

Interesting. What is the range of this device? If its effective range is anything above half a meter then it would raise serious privacy concerns. I can image that different persons would produce a different movement signature when moving into the range of the sensor. It is definitely an interesting device but any additional sensory data at the hands of Google makes me tiny bit more nervous.