ASUS confirmed several times that ZenWatch 2 and ZenWatch 3 will get Android Wear 2.0 update, and although the update was expected to arrive by the end of the second quarter, the company has yet to start rolling it out. Even ASUS USA said a few days ago that the update will be released in the coming weeks, but that tweet has since been deleted.
The update is nowhere to be seen and it is safe to say that ASUS ran into some problems and had to postpone it. At this point, we have no idea when the updates for either watch will arrive.