Checkout the percentage growth from Indeed's job trends. The graph below shows the increasing demand for these key technologies in job postings. With support from industry giants like Google (committed to AngularJS), these frameworks have matured quickly to support almost any sort of application.
On the Server-side
By securing and exposing your business processes as RESTful services, you can share exactly the same business process between your Mobile and Web platforms. This reduces the time to market and supports consistent rules and data across mobile and Web applications.
On the Client-side
This sort of multi-channel support makes it really easy to quickly deploy new features to your browser-based SPAs and in some cases, using Responsive SPAs, can eliminate the need for native mobile apps altogether. It also eliminates the native Mobile app's multiple technology stacks (iOS, Android and Windows) and their multiple App Stores.
From a business innovation point of view, the Responsive SPA has the potential to deliver a consistent user experience across both Web and Mobile platforms from a single codebase! Subsequently, your teams can deliver more inovative features in less time and you control both your release cycle and your brand by avoiding the App stores.