I'm skeptical about the maturity level of "smell" related technology. It's been around the corner for some time now, but making it work in non-laboratory setti

I'm skeptical about the maturity level of "smell" related technology. It's been around the corner for some time now, but making it work in non-laboratory settings seems to be really hard. I observed development of a hazardous-gas monitoring system that used a gas chromatograph and mass spectrometer, and the calibration and uniformity proved to be a real problem. And the final unit was rather heavy (many kg), large, and power-hungry. This would make it hard to deploy into regular homes, as seems to be shown in the video.