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Improved sleep tracking. If that doesn't ever improve, the Ultra 2 I have right now may be my first and only Apple Watch.

Thought estimated blood glucose would be so interesting that I'd be willing to try it nonetheless.

Blood pressure too. Both of these are things I have low confidence in being reliable, but if someone's going to do it, I'd want to experience it for myself.
Hi! What would improved sleep tracking look like to you? I like how a few versions ago watchOS started breaking down sleep in to different phases (used to just be awake/asleep), so unsure what more they can do- then again I’m no expert in this field. Interested in your insights :)
 
As per the title.

I’d like a sensor/function that can measure your stress level.

You?
Check the app Athlytic, it gives you stress level.

As per the question: a significant increase in battery life. My 2 days (AWU2) is ridiculous.

Rest of potential stuff is good to have, but not really a big change. And I don't expect glucose levels this year, or in the coming years.
 
I’d like the 10 to get rid of the large bezels around the screen (such a step back compared to the 7-9. For the Ultra 3, a slightly new design/thinner with same battery life or same thickness with improved battery life, and a larger screen.
 
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Hi! What would improved sleep tracking look like to you? I like how a few versions ago watchOS started breaking down sleep in to different phases (used to just be awake/asleep), so unsure what more they can do- then again I’m no expert in this field. Interested in your insights :)

Apple Watch does really good sleep data, but it's not nearly as good at sleep tracking. If you take naps, have abnormal sleep patterns, or have a low resting heart rate, you'll quickly discover that it often thinks you're asleep when you're not and vice versa.

I came to Apple Watch by way of Fitbit. Fitbits are considerably better at tracking when you're awake or asleep. They're just as erratic at first, but they seem to learn from your patterns whereas the Apple Watch continues to make the exact same errors months later.
 
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