Scott has been the chief technology officer for Nvidia's Tesla GPU coprocessor business for two years. It seems the news has been confirmed by Google, which has not thought to tell anyone what he is doing yet.
Scott spent 19 years designing systems and interconnects at Cray when he left he held 27 US patents in the areas of interconnection networks. He was the lead designer on Cray's X1 parallel vector machine, and was one of the key designers for the "SeaStar" interconnect. This makes him a great catch for Google, but it seems that Nvidia’s Tesla could not hold his interest.
Bill Dally, Jonah Alben, and Sumit Gupta, appear to be involved in keeping Tesla going now it has lost its leading light.