If you've got one of those shiny new Android Wear watches to fiddle around with, you've probably noticed the sad state of custom watch faces. There are a few already in the Play Store, but they often don't work right. Google has finally provided an update for developers on what they should do about custom watch faces. Basically – don't make them yet.
All the custom watch faces we have right now are basically hacks that are using workarounds to show you the time.