You're a web developer, yes? In my circles NaCL is looked at with interest because there's no way possibly for us to produce apps to the level of quality we do elsewhere -- and without a huge amount of pain -- while using the web's organically grown technology stack.
Google at least understands the flaws. Web developers seem to have their head in the sand while mobile may very well eat their lunch.
NaCl and Dart were both created in a Dart room without anyone else's input.