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I can see the appeal of everything else Amazon announced (even the glasses, which have value in that they're basically headphones you don't have to take off when having a conversation). But cannot figure out the target market of this. I'm even someone who is interested in the idea of a smart ring, but the feature it needs is sleep tracking (since I haven't ever been able to sleep with a watch or band).

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Sleep tracking is the only thing I can think of that would be usefull.

I could see some use in fitness tracking when playing a sport where you'd be asked to take off a watch (pickup basketball, for example). But that's why I think there could be a market for it - its value prop is simply that it's both extremely low profile and connected. The Oura ring is simply too expensive for me, but I think I'd pay $130 for a wearable sleep tracker that integrates with Apple Health that provided me high quality data about my sleep quality.

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