Technet: Today, in the third Technical Preview of Windows Server 2016 and System Center 2016, we are releasing the first public preview of Windows Server Containers to bring these benefits to our customers. We are also introducing features including new Nano Server functionality and software-defined datacenter enhancements to help you build a solid foundation for modern applications and services.
If you're looking at the way Windows Server 2016 focuses on containers and Docker and worrying that it's going to be better designed for running Azure than for the servers in your office or the virtual machines you use on AWS, lead architect for Windows Server Jeffrey Snover suggests thinking about it the other way round.
This change aligns with the licensing scheme now used for SQL Server, among others.