As Metal is Mac-specific, I would doubt it.
As an aside, I also find it regrettable that for the second time in its history, Apple is choosing to try and push their own 3D API instead of using an existing one, and it will be to their detriment. They are lagging in their updates to OpenGL, making it harder for cross-platform developers of games to target their platform, and pushing Metal, which is really only useful if you're already developing on iOS. So, good for porting mobile games, useless for porting Windows games.
It's QuickDraw 3D all over again. Brian Greenstone, where are you?