No clunky wearables? No chest strap on the treadmill? Heart rate and respiration? Monitors everyone in the house simultaneously 24/7 on a cheap rpi? I hope this doesn't take years to come to market because this seems incredibly useful.
Could also see the value of this for caregiving. I caretake for my grandmother, and even something as simple as keeping airtags on her keys has been a challenge. It would be impossible for her to consistently wear some wearable health device / life alert / etc. passive health monitoring that’s not intrusive would be amazing.
I've not followed any evolutions in this area, but there's a cool paper from 2014 about using WiFi channel state information to detect 87%(!) of falls in an experimental condition[1]. It's been a while since I read the paper, and I no longer have access, so caveats aplenty, but it's one of those things that pops into my head sometimes and I wonder if it's seen any real-world deployment.