This is the kind of stuff that pushes me to pull a Ron Swanson and throw my technology in the dumpster.
Commercialization gives consumers and regulators the opportunity to express their opinions on the sudden and unsolicited transparency of the walls, floors and ceilings of their homes and businesses.
The core of the sensing technology is about improving MU-MIMO + OFDM + all the other speed tricks. Human bodies interfere in predictable ways so you need the tech to steer around that. As a side effect, you get detection capabilities for free.
In such a setup, your laptop and router already know where you are. The question is whether or not to offer it to you so you can use that information for things like home automation. Had they not made this part of the protocol, the privacy risks were just as bad, you just wouldn't be aware of them.
TSA can check your heart rate / breathing rate elevating during your walk through security.
Casinos can see your heart spike before placing a bet. If the system is digital maybe that can be synced to always deal a loss hand.
What's the economic value of remote collection of human behavioral signatures without consent, integrated with AI and robotics and "digital twins"? We're not there yet, but if the technology continues improving, what's the future value of "motion capture" of humans without body-worn sensors?
In theory, this will enable "Minority Report" user interfaces. 3D gestures could be combined with "AI" voice interfaces. Biometric authentication (e.g. heart rate) could replace passwords. Walk into a room and it adapts itself to your preferences. Etc.
There are lots of "cool" Jetsons sci-fi use cases, but ONLY IF the data and automation are entirely under control of the human subjects, e.g. self-hosted home server, local GPUs, local LLM, local voice recognition, etc.