Seems strange they don't mention Vulkan. While OpenGL will continue to be developed, Vulkan is lower-level and plays into the architecture of modern GPUs. Edit:

Seems strange they don't mention Vulkan. While OpenGL will continue to be developed, Vulkan is lower-level and plays into the architecture of modern GPUs. Edit: I am wrong here and apparently can't find properly. I'm not entirely confident that Metal will see widespread adoption become outside of iOS devices. And while that's a big market, it's on the opposite spectrum of the more powerful, and niche, Mac Pro.