Google recently provided a list of Android-based wearables that have or will receive the Android 8 Oreo update.
According to Google, Oreo is already available to the Fossil Q Venture, LG Watch Sport, Louis Vuitton Tambour, Michael Kors Sofie, and the Montblanc Summit. Watches that are testing Oreo include selections from Casio, Diesel, Emporio, Fossil, Guess, Huawei, Hugo Boss, LG, Michael Kors, Movado, Polar, Tag Heuer, Tommy Hilfiger, and ZTE. The one player not on the list is Asus.
As always, the exact timing of the update is up to each individual manufacturer.
Android 8 Oreo for Android Wear is a minor update that tweaks some notification behaviors and vibration settings, and adds new languages and notification channels for improved battery life.