I have several nice watchfaces I love on my 3HR. Since the 5x/5 have more pixels I think that would be a complete re-write for all of the watch faces. I hope not, what do y'all think?
Would suck big time to wait months for cool watch faces.
Because of the difference in both pixels and fonts, the developer may have to make some changes. But the good news is many things are ready! If you check under "compatible devices" for your watch faces in the store, you may already see the f5 and f5x.
The SDK that supports the f5s/f5/f5x has been out for a bit. While there's no over all link in the app store yet per devices, you can also see the list of what's already available per device with these links. More things are also being ported every day!
https://apps.garmin.com/en-US/devices/fenix5/apps
https://apps.garmin.com/en-US/devices/fenix5s/apps
https://apps.garmin.com/en-US/devices/fenix5x/apps