That’s it. Docker won over Windows containerization as well!

Microsoft just announced it will add to its support for Linux VMs running Docker Linux Containers, support of Docker engine inside Windows Server and Windows Azure, to support native Windows containers,

More info here: Docker based Windows containers

This means you will be able to develop and support your Windows Apps within a slim agile-to-maintain container. What happens to licensing is one question, and what happens to security is definitely another worthy question.