Came across this article on VR-zone, but there is no real source, so take it for what is worth - although there is no doubt in my mind that Nvidia is doing everything they can to get there first and push that X2 monster out of the door.
http://www.vr-zone.com/articles/Nvidia_Prepares_For_40nm_GPUs/6020.html
http://www.vr-zone.com/articles/Nvidia_Prepares_For_40nm_GPUs/6020.html