Why gesture control, smart band and facial recognition could all land one day

The Apple Watch is undergoing constant development, and when you look back over the previous generations, so much new technology has landed on Apple’s smartwatch.

But what does Apple Watch Series 5 such as ECG readings, Fall Detection and LTE all have in common? They all landed as patents years before they hit the Apple Watch that millions are wearing on their wrists.
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https://www.wareable.com/apple/apple-watch-patents-exciting-future-7928