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Apples upcoming AirPods might have built-in cameras
No, not that kind of camera.
These cameras would be similar to the Face ID received on the iPhone, and would like be produced by major Apple supplier Foxconn. These cameras, which could detect environmental image changes, would enable new spatial audio experiences, Kuo claims. With the addition of infrared cameras to AirPods, Apple could probably get a lot more precise head movement tracking, allowing for richer experiences.
Or read this on Mashable