At approx. 26min he mentions four processors that their code generator has to target: ARM32, x86, x64, and a new one coming out in the fall. What would that be?

At approx. 26min he mentions four processors that their code generator has to target: ARM32, x86, x64, and a new one coming out in the fall. What would that be? ARM64? *edit - never mind. Last five seconds they hint at it as arm64. MS is definitely doing some interesting stuff these days.