http://www.hpcwire.com/blogs/NVIDIA-ARMs-Itself-for-Heterogeneous-Computing-Future-113025584.html

"As part of this strategy, the company has obtained rights to develop its own NVIDIA-designed high performance CPU cores using ARM's future processor architecture. Presumably this will be based on a future 64-bit implementation of the ARM ISA, given that 64-bit computing is the accepted standard outside of the mobile space."