Actually ArchiMate 2.1 is a specification maintenance release incorporating comments, corrections and clarification issues which were raised since version 2.0.
For further details with respect to the changes refer to this official blog post by The Open Group. In addition a detailed listing of the changes is available as a dedicated document.
Only hours after the release, vendors of flexible EAM tools announced support to version 2.1… 😉
The Open Group released ArchiMate 2.1
