Yes, it does get much better accuracy. My company is developing temp screening/survey answering entry kiosks, we've put a lot of effort into getting higher accu

Yes, it does get much better accuracy. My company is developing temp screening/survey answering entry kiosks, we've put a lot of effort into getting higher accuracy than the generic imported kiosks. Forehead temperature is highly variable with ambient conditions - sweating while walking in reduces surface temperature, but sitting in a low-humidity air-conditioned car with your face in the morning sun increases it. After as little as 60 seconds in a conditioned space, though, skin surface temp is pretty much normalized. The camera scanners are using Flir microbolometers, which have a huge amount of noise/calibration variation, even on a per-pixel basis. The handheld guns and kiosks which require alignment are using thermopile sensors work much better for employee check-in, they have like a 1:10 spot size so you need to be within a foot or so of the sensor and intentionally align yourself with the sensor. The reading takes about 2 seconds to align and measure, which is fine for clocking in but, as you said, doesn't work in a crowd.