http://www.techradar.com/news/android-oreo-is-coming-to-android-wear-watches-from-today

A new update will be heading to Android Wear watches from today that brings Android 8 Oreo-based features including some new battery saving enhancements and more.

It's not a major upgrade like Android Wear 2.0 was when it launched earlier this year - and it's likely Android Wear 3.0 will be bigger too - but it does bring some interesting tweaks to your watch.