@sg707 there will be a couple of articles on the Aurelia framework coming to the JS channel in the next couple of weeks. I think Aurelia could become a real contender on the framework scene.
As regards what happened with Angular 2.0 - it will be a complete rewrite of the framework. There is currently no upgrade path from 1.x and as you can imagine, that caused quite a furore. You can read all about that here: http://www.sitepoint.com/whats-new-in-angularjs-2/