The Ionic framework is one of the most popular projects on GitHub. By letting web developers use their existing skillsets to make apps for mobile devices, Ionic has enabled a whole generation of apps. One of the reasons for Ionic's success is that it builds on the popular Angular web framework. That means a lot of changes to Ionic with the new version of Angular.
You may also be interested in Get Started With NativeScript and Mobile Angular 2 and Easy Mobile Apps With Ionic Creator.