Soli also supports some basic gestures like holding your hand up to pause media or waving to snooze an alarm.
Google says the raw Soli data (above) never leaves your Hub - machine learning enhancements allow the smart display to do all the processing locally to further preserve your privacy. This is similar to what you get with various fitness trackers and smartwatches that have sleep monitoring features, but you never have to worry about forgetting to wear your device to bed. Over time, Sleep Sensing can offer actionable tips to improve your sleep, too. Combined with temperature and light levels, the Nest Hub can track your sleep and feed that data into Google Fit. Google says Soli in the Hub is accurate enough to detect the general shape and position of a person, but not specific faces or bodies. The Soli radar module creates a bubble where the Hub can track your breathing and movement overnight. The Hub won't be able to see you, but it still kind of "sees" with radar waves.
The lack of a camera is actually a selling point here as it ensures a certain degree of privacy. From the report: According to Google, about 20 percent of first-gen Nest Hubs were placed in bedrooms, and the new Nest Hub can only show its full capabilities when you put it next to your bed. "Sleep Sensing" is the highlight feature, though, as "there's still a 7-inch display with a middling 600p resolution, a rear-facing fabric-covered speaker, and the device sensors poking through the otherwise uniform bezel," reports Android Police. Google's second-generation Nest Hub will be able to track your sleep via a Soli radar sensor - not a camera.
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