So with Metal 2 on macOS High Sierra, we'll get: - better performance. Apple says 10 times the draw call rate of Metal 1.x. This seems impossible. - External GPU support. I'm curious about the specifics. Will we be able to use an eGPU to power the internal display? What about non-Metal apps, will we get a black screen? EDIT: apparently eGPU will work regardless of the API. - VR support. We have the SteamVR SKD, Unreal Engine and Unity Support. I wonder if Valve ported Source 2 to Metal. Last I heard, they were not so fond of Metal as they basically initiated Vulkan Overall, it seems Apple is taking graphics performance very seriously. The WWDC sessions will be quite interesting. EDIT: corrections related to VR.