[jplona]

I want something like this for accurate room presence detection in my house (for lights etc) that doesn't require dozens of PIR sensors or similar.

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.

[miskin]

WiZ lightbulbs actually surprised me with this feature - they call it SpaceSense. You need two of their lightbulbs in a room to enable that feature: https://www.wizconnected.com/en-us/explore-wiz/spacesense

[XorNot]

I'd settle for just "is there a person in this room?"

Taking even 30 minutes to converge that answer would still be great for lighting automation.

[transpute]

There are mmWave (5.8-60GHz) human presence sensors, https://smarthomescene.com/reviews/best-mmwave-human-presenc...

Aqara FP2 from China can isolate humans and room zones, https://smarthomescene.com/reviews/aqara-fp2-human-presence-...