Microsoft Dynamics AX 2012 R2 is now available for customers and partners!!! This release offers tremendous value for our customers and delivers on our promise to enable enterprises to become Dynamic Businesses!
The content publishing team has finalized an R2 New Features List. It has only 1 line descriptions of features, and is intended to be used with the New, Changed, and Deprecated Features Guide, which is cumulative.
That does contain new installation, upgrade, system requirement etc. guides as well.
E.g. the renewed upgrade guide can be found here http://www.microsoft.com/en-us/download/details.aspx?id=14599. Nice to know maybe: you can do a simple upgrade from AX 2012 RTM to this R2 without first installing the Feature Pack.