“We pride ourselves on being the first to adopt any important new technology that can improve our games so you would expect us to get with DX10.1 right away but we’ve looked at it and there’s just nothing in it important enough to make it needed. So we have no plans to use it at all, not even in the future.” - Cevat Yerli, Crytek CEO
http://www.techarp.com/showarticle.aspx?artno=472&pgno=1