Google announced a new developer preview for Wear OS, that corresponds to "Android P".

For now, this preview is only available to the Huawei Watch 2 and Huawei Watch 2 Classic.

In this Android P Wear OS preview, the update is supposed to introduce “Android P platform features to wearables.” Here are a few of the details that Google provided:

• Dark UI system theme: This actually showed up in a recent update, but it becomes the default in Android P. Google hopes this should “improve the glanceability for wear apps.”
• Limited background activity: Apps no longer run in the background unless your watch is on a charger. The only exception is watch faces and complications that are currently selected. Google says that Wear OS is going “further with Android’s app standby feature than some other form factors.” I guess we’ll see how that plays with your app-loaded watches.
• Turning off radios when off body: When you take your watch off, Wear OS will now try to turn off Bluetooth, WiFi, and cellular radios to improve power consumption and extend battery life.
• WiFi off when Bluetooth is disconnected: When disconnected from Bluetooth, your watch will no longer automatically switch and connect to WiFi. Like the previous bullet, this is for power consumption improvement.

Wear OS Preview 1: Release Notes

Via Android Developers & DroidLife

 

Edit: Not this one, you are probably thinking about the Wear OS update that others have reported. I am not wearing it today, so I cannot post my own impressions yet.

 

You are absolutely correct. When I wrote my comment, I thought they were talking about the Wear OS update. I have amended my post above to reflect this. Thanks!

 

I just upgraded my watch. I have the same version as you. This is not "Android P preview". This is just the Wear OS update that everyone else is getting. If you don't believe me, notice that the Android OS is still 8.0.0 at the bottom of the versions.

 

Yes.

 

Google is still making lots of changes. Just this week they announced they've had to reverse some of the battery optimization changes they had made, as they were causing negative effects on some of the alarm notifications.

I'd say don't worry about it, unless you are a developer, or become affected first hand.

 

I was about to post this too. Let's see how the update goes. Merging to existing thread.

 

I'd rather prefer a built-in speaker and LTE for calls than a heart rate monitor.

 

Here's the link to Google's official post:
https://blog.google/products/wear-os/wear-os-google-health-and-help-are-just-swipe-away/
=======================================
Wear OS by Google: Health and help are just a swipe away
By: Dennis Troper Director of Product Management, Wear OS by Google
Published: Aug 29, 2018

As you go about your busy day, every minute matters. We’re evolving the design of Wear OS by Google to help you get the most out of your time—providing quicker access to your information and notifications, more proactive help from the Google Assistant, and smarter health coaching—all with a swipe of your finger.


Easier access to notifications and more
We’re making it easier to browse, dismiss or take action on your notifications with the new notification stream. Simply swipe up to see all your notifications at once. See an important message? Just tap to select a built-in smart reply without even leaving your stream. Swipe down on your watch to get quicker access to handy features and shortcuts like Google Pay or ‘Find my phone’.


More proactive help from your Google Assistant
With the new design, you can now receive proactive and personalized help from your Google Assistant. Let’s say you’re headed to the airport—swipe right on your watch to see your flight status or hotel reservation. Tap on smart suggestions like the weather at your destination or find a restaurant near your hotel. When you’re getting ready for the day, your Google Assistant will help you stay ahead by reminding you to bring an umbrella, showing you your day’s meetings, or warning you if there is a delay on your commute. The Google Assistant will also suggest features you may not have tried yet and will become more helpful over time as it gets to know you and as we add new features.


Smarter health coaching
Last week, we announced that Google Fit is making it easier to be healthy with two new activity goals: Heart Points and Move Minutes. We worked with the American Heart Association and the World Health Organization to design these goals based on their physical activity recommendations which are shown to have health benefits for your heart and mind. Now, you can simply swipe left to start a workout or see how you are tracking toward your goals.


We’ll begin rolling out these new features over the next month, so look out for updates on your Wear OS by Google smartwatch. Some features may vary by phone OS, watch or country.