My only concern is lack of browser support. Because Dart compiles to JavaScript (which can even perform better than handwritten JavaScript to perform the same

My only concern is lack of browser support. Because Dart compiles to JavaScript (which can even perform better than handwritten JavaScript to perform the same actions[1]), it runs everywhere. You don't need the Dart VM built into a browser for your Dart application to work; it already works today. What would it take to get these vendors to add support? I think that likely they would want to see more applications written in Dart. If a big company (like Facebook, for example) wrote a large application in Dart, other browser vendors would see both that big name developers are using Dart for their applications and they'd see the performance boost that browsers with the Dart VM built in take advantage of[2]. This would make it more compelling for them to include a Dart VM in their browser. [1]: http://news.dartlang.org/2013/03/why-dart2js-produces-faster-javascript.html http://news.dartlang.org/2013/03/why-dart2js-produces-faster... [2]: http://dartlang.org/performance http://dartlang.org/performance