Just a few days after the ZenWatch 2 (1.63") started getting the Android Wear 2.0 update, the smaller variant (1.45") has also begun receiving it. A quick look at the Android Wear 2.0 FAQ thread on official Google Forums reveals that the ZenWatch 2 (1.45") is now in the list of wearables that the company says have already received the update. The following screenshot shows the complete list: So now, the only wearables that are compatible, but haven't received the Android Wear 2.0 update yet are the Moto 360 Sport and LG Watch Urbane 2nd Edition LTE. There's, however, currently no...
Source: http://www.gsmarena.com/android_wear_20_update_starts_hitting_smaller_zenwatch_2_units_as_well-news-26337.php