Aurelia just went production status. Angular 2 is in RC 5 and is still changing daily on many fronts. I do believe Angular 2 holds promise but, several months out before truly stable enough for production consideration.
I have found Angularjs is pretty sound at release level 1.5.
Have not tried Vue, Backbone or Ember, just lost intrest on learning yet a new framework. I’ve reviewed but, did not see a clear advantage to the technology.
I’m not sure React can be consider a framework, except maybe for UI design, There is so many other libraries one needs to bring to the mix if you look to assemble a “true Framework”, like Redux (i.e flux design concept).