There is a function to have messages from Webex appear on the Android watch. I believe this also works for Apple watches. This function used to also work for phone calls, but has since stopped.
As you can imagine this feature is VERY handy in meetings or when meeting with clients as it allows us to briefly look at our watches to see who is calling and if it is important.
I would love to see this feature returned. As I mention, it currently works for messages, but not calls.