A new article has appeared on the TechNet Wiki that provides a complete list of updates for Hyper-V on Windows Server 2012:

http://social.technet.microsoft.com/wiki/contents/articles/15576.hyper-v-update-list-for-windows-server-2012.aspx

I am really happy to see this online, as we have received lots of positive feedback about how useful the existing documentation is for updates that are available for Hyper-V on Windows Server 2008 R2 and on Windows Server 2008.  Hopefully this will help everyone in planning and managing their Hyper-V deployments.

--> Please see the rest on Ben's Blog : http://blogs.technet.com/b/virtualization/archive/2013/04/16/updates-for-hyper-v.aspx