Wi-Fi light bulb won CES 2022 award, expected to ship in 4Q 2022. Logs of detailed human activity, in-room 3D location and timestamps can tell a story over time. https://us.sengled.com/blogs/news/the-biggest-ces-2022-smart...

> We earned this year’s award for a product targeted to launch in the fourth quarter: our Smart Health Monitoring Light. Featuring a Wi-Fi, Bluetooth Mesh dual chip, the bulb will provide a number of features, including biometric measurement tracking of heart rate, body temperature, and other vital signs, as well as sleep tracking. By connecting multiple bulbs via Bluetooth Mesh and creating a virtual map across your home, this product can even help detect human behavior and determine if someone has fallen and then send for help.

With decent processing a mm-wave picture would be good enough that you could recognise a person, so I don't think there is any inherent anonymity. The image resolution is a function of both wavelength and aperture and a mm-wave antenna can extend over a significant number of wavelengths (ie. large aperture). A stable timebase would further allow processing across time, enabling synthetic aperture.

Also, a person is not a randomly shaped object. If the processing is specifically tuned to detecting and identifying people an awful lot of degrees of freedom can be eliminated, giving more detail in those features that do identify a person.

I think you are still off about the privacy aspect. At the source, a return from a single radar pulse is pretty uninformative. But a single pixel on a camera sensor is also uninformative. Even at the source, an aggregated set of radar returns is still a privacy concern on the level of an aggregated set of camera pixel values. Not operating in the light domain doesn’t make the privacy concerns go away, it just means that laypeople aren’t going to understand the risks as intuitively.

No its not. There is no anonymity at source. Once this is there, it will be coupled with other PII. Anything otherwise is plain foolish and lunacy