For anyone who want to test the new release of Windows server, now it is possible to download the technical preview 3 on MSDN. This version has many new features and it has corrected many errors or missing functionalities. I would suggest to everyone to try it as is the last TP before RTM and if you want to be prepared at server launch, you have to learn new things now. If you want to know exactly what is new in TP3, you can read it at http://blogs.technet.com/b/server-cloud/archive/2015/08/19/what-s-new-in-windows-server-2016-and-system-center-2016-technical-preview-3.aspx and https://technet.microsoft.com/en-us/library/mt420609.aspx.
There are also Microsoft blogs which I want encourage you to read:
Windows containers: http://weblogs.asp.net/scottgu/announcing-windows-server-2016-containers-preview, http://blogs.technet.com/b/server-cloud/archive/2015/08/19/new-windows-server-preview-fuels-application-innovation-with-containers-software-defined-datacenter-updates.aspx and http://highscalability.com/blog/2015/8/19/the-microsoft-take-on-containers-and-docker.html. .
