Does Dart have any useful features for web programmers?

Question

http://www.dartlang.org/

I've checked out the site very briefly, and got curious. Is there any advantages of using Dart? Is it just a replacement for JavaScript?

It looks like simpler Java. Writing quite a lot of C# at work, the language feels very much like what I'm used to, so learning the syntax looks like a breeze to learn. Has anybody any opinions or experiences with the language?

(Compared to CoffeeScript (= I'm not doing Ruby syntax) the syntax looks more familiar to me).