Your license entitles you to a 1 year subscription to all releases/hotfix builds from the date of purchase. This includes the C1.Xamarin controls, so you won't need to worry about purchasing a new license upon release.
Also, we strongly encourage our users to use the C1.Xamarin Beta controls moving forward. We are eager for your suggestions and feedback to help improve them along the way. The new architecture for the C1.Xamarin controls is strongly aligned with our C1 Studio (Desktop) and Wijmo (Web) products which makes cross-platform development much easier. The C1.Xamarin controls will be available in Xamarin.Forms, Xamarin.iOS, & Xamarin.Android platforms.