[amelius]

But realistically, using what sensors?

And (maybe less realistically) what if the theater puts 5 Apple sensors inside a sealed CO2-free chamber, spread around the room?

[kingkawn]

That’s the point of this thread that each device would have a small sensor that would sync and aggregate with others in the room

[amelius]

I think the thread established that CO2 sensors are too bulky for that.

[mrgyro]

So were most other sensors before Apple (and their suppliers) miniaturised the sensors. Gps and imu was huge in the 90s, several pound each.

[amelius]

But this is wishful thinking.