One of the perceived advantages the Google Nest Hub smart display has over its Amazon and Facebook-made counterparts, is the absence of a camera.

For those privacy-concerned folks, the idea of a live camera in their living room or kitchen – Echo Show or Portal-style – doesn’t tend to sit well. However, that doesn’t mean the Nest Hub (formerly Home Hub) smart display can’t track where you are in the home, when you issue commands via the Google Assistant.
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https://www.trustedreviews.com/news/google-nest-hub-doesnt-camera-can-now-sense-presence-3952751