Even though I work with Typescript daily, Typescript feels like a stop-gap measure until ES6 /ES.Next take hold. Dart feels like the future - given Fuchsia + Flutter + Android apps in Chrome, etc. - if they can just work out some of the rough edges(e.g. isolates with Flutter) and make it more harmonious with JS/DOM - let's face it: We are stuck with the JS/HTML/CSS stack for the foreseeable future.