I realize this is marketing copy, but what exactly is evolutionary about using open source software and providing an SDK for a smartwatch? How does this differ from Apple's offerings? Sounds like the evolutionary part is that you can use JavaScript.
For the past few years, the Gear watches and fitness wearables have been running full Linux. If you enable Wi-Fi debugging, you can actually ssh in to the smartwatch and poke around the file system.
The UI story is a mess though. There's EFL, a C-based GUI layer of somewhat legendary status in Linux circles (it's derived from the Enlightenment window manager). It's plenty fast, as a smartwatch should be, but kind of a bastard to program for.
Alternatively you can write HTML apps, but they run like sedated dogs on the smartwatch.
Last I heard, Samsung was trying to add React Native into the mix. I'm not very convinced that adding in yet another runtime will fix the fundamental problem.
https://fosdem.org/2018/schedule/event/tizen_rt/
Which is yet another variation of Tizen.
I agree there aren't any good options. Given the choices on Linux, EFL actually makes sense for a smartwatch.
Show HN: Cross-platform desktop applications with PyQT | https://news.ycombinator.com/item?id=16318677
This is what JS Foundation thinks compelling content marketing is, I guess?
[1] Created by Moddable (moddable.com), formerly Kinoma. Terrible name, which I think is one of the reasons it's criminally-overlooked. [2] http://kangax.github.io/compat-table/es6/#xs6 [3] http://kinoma.com/develop/documentation/js6/