[ramity]

5GHz WiFi has a wavelength of ~6cm and 2.4GHz ~12.5cm. Anything achieving smaller is a result of interferometry or a non WiFi signal. Mentioning this might not add much substance to the conversation, but it felt worth adding.

[littlecranky67]

This resolution is probably enough, as they use human skeleton pose estimators and human movement pattern detectors too.