Is it possible to use TAU (or other light UI alternatives) on watch face?
Yes, you can use TAU to create watch face. TAU makes your code simpler. It allows to navigate between pages, create UI elements like popups, buttons, label etc
Read more about TAU on Samsung developers guide: https://samsung.github.io/TAU/
As is still JavaScript you can use other libs as well.
Is it? Since there are many limitation for watch face… eg cannot use back button).
Is there any templates or samples on using TAU watch face?