I hate to be that guy, but I really don't see Dart going anywhere (at least inside a browser). Microsoft will probably never support it. For the same reason, it

I hate to be that guy, but I really don't see Dart going anywhere (at least inside a browser). Microsoft will probably never support it. For the same reason, it's not looking good in any other browsers either. Even if it did get immediate and full-spectrum support, it would be years before you can do anything with it (without compiling down to JS in order to support older browsers which makes using it kind of useless anyway). If I really wanted to write in a new language just to compile to JavaScript, I'd be using CoffeeScript already.