As you may already know, if not this is it 
, Microsoft has made some major announcements last week about the future version of Windows Server (Windows Server 2012 R2), SQL server (SQL Server 2014), System Center (System Center 2012 R2) and Windows Azure.
So, if you want to start evaluating these new coming version you can go to the Eval Center here http://technet.microsoft.com/en-au/evalcenter/dn205292.aspx