Nvidia's Project Denver [1] is very similar. A 64-bit ARM based CPU for servers that they started working on a few years ago.

[1] http://en.wikipedia.org/wiki/Project_Denver

Edit: It seems the announcement from AMD is in response to this announcement from Nvidia, the 2014 date also matches: http://www.xbitlabs.com/news/cpu/display/20120921010327_Nvid...