ECMAScript 6 (ES6) still sounds like something from a far-away future. After all, it will only become a standard by mid 2015. However, its features are continually appearing in browsers and there are compilers that translate ES6 code to ES5 code. The latter is already a compelling solution, because the ECMAScript 6 feature set is already frozen.
This blog post gives a brief overview of ECMAScript 6 features and describes tools that enable you to use them today.