https://arstechnica.com/gadgets/2017/12/android-wear-gets-updated-to-android-8-0-oreo/

Remember Android Wear? Google's struggling smartwatch OS is getting updated to Android 8.0 Oreo, just like the rest of the Android lineup. Google announced the update on the "Android Wear Developers" Google Plus group. It seems like the only supported watch right now is the flagship LG Watch Sport, which makes sense since that was the only watch to get an Android O beta in the beginning of October.

Wear's last big update was Android Wear 2.0, which was released with the LG Watch Sport the beginning of the year. Most users won't notice the move to Oreo. Like Android TV, Android Wear has its own interface and set of features that are developed separately from the base OS version. This update to Oreo changes the under-the-hood OS, but the user-facing features will mostly remain unchanged.