My dream is that the lights in my long hallway gradually dim up in front of me and back down behind me as I walk.
Taking even 30 minutes to converge that answer would still be great for lighting automation.
Aqara FP2 from China can isolate humans and room zones, https://smarthomescene.com/reviews/aqara-fp2-human-presence-...
With that said, even if we mmWave sensors see significant improvements to latency, cost, and power consumption, I’m fairly convinced that it alone will never give me a completely satisfactory solution to presence. My garage/home office situation may be unique (or not), but I’ll always need a synthesis of multiple inputs/cues (SPL monitor, active BT connections, contact sensor activity, etc). Gotta love the lights shutting off abruptly while soldering audio equipment b/c I was laying down on the floor in the corner, and rather still, instead of doing normal human things. As with all good problems, just throw another abstraction layer at it :)