Adding two more resources in addition to @demwunz's links:

• List of resources to learn ECMAScript 6
• Addy Osmani's resource post about ES6

@Macro_T you can try these resources as a start - leanpub.com/understandinges6 and es6rocks.com . From a practical standpoint you may also want to get into Babel at some point too babeljs.io

Here are a few more resources on ES6 :

• Luke Hoban's es6features gives a solid overview of ES6
• ECMAScript 6 support in Mozilla lists out and explains supported ES6 features in FireFox
• A series of articles by @sandeep at HTMLxprs also explains many features of ES6