It detects when I'm washing my hands and counts down 20 seconds then congratulates me!
If my phone needs Face ID but I'm wearing a face mask, my watch unlocks my phone.
I can use it for Apple Pay so I don't need to get out my wallet or my phone.
The mic can be permanently on so you just say "set alarm for 15 minutes" and it will.
The wake up alarm is nice and gentle.
It takes regular SpO2 readings. I have asthma so like yo keep an eye on this.
It shows the image from my ring doorbell.
You can pop it on a water setting, so it doesn't think the water is swiping the screen. You can then force water out of the holes using a sonic wave thing (not sure if technical term!)
It can help you find a lost phone by getting the phone to make a noise even if it's on silent. I use this a LOT.
Its screen is as good as an iPhone screen for touch. My Fitbits were shit in this regard.
You can answer phone calls on it and talk using it.
As far as I can tell, it will support any app. All the usuals like activity, sleep, texts, emails, phone calls, weather, calendar, but also Spotify, Shazam, ECG, SpO2, photos, remote camera trigger, plane finder, London Underground map, find my friends, ring go parking...!
I've only had it three weeks (the 6) so I'm still learning, but I bloody love it!