Solid clean C API. Phone does all the heavy web-lifting, it really is best of both worlds.
Also PebbleCloud is one of the slickest web IDEs I've seen(working emulator streaming over VPN!).
ESP8266 gets close, but I haven't worked with it enough to make a formal opinion on it.
Things are looking more and more exciting.
Solid clean C API. Phone does all the heavy web-lifting, it really is best of both worlds.
Also PebbleCloud is one of the slickest web IDEs I've seen(working emulator streaming over VPN!).