I'm somewhat surprised that one of the touted features of smart watches never materialized, and doesn't seem to matter... early prognosticators proposed lots of custom faces: ones that emulated famous watches, ones that allowed a wide variety of placement of "complications", and ones that intermingled various ways of displaying time.

While the big brands did release customized versions of their famous faces (Tag Heuer) and Apple got sued for making a clock that looked like a Swiss Railway Clock (licensed by Mondaine), the idea of downloadable faces or themes, made by users or junior devs, never really became a thing.

I miss it; I think the apple watch face options are really lacking (though Mickey makes me laugh even now). But I seem to be in the minority of wanting more...