Earlier quoted context omitted.
No need when Unreal, Unity, Crytek and every other game engine that matters already support Metal.
I've not heard of any games or VR software released to the market that use Metal yet. I've heard it mentioned about projects still in development but so far that's all. Do you have any examples of things using it?
https://itunes.apple.com/us/app/vainglory/id671464704?mt=8
https://itunes.apple.com/gb/app/sky-gamblers-storm-raiders/i...
https://itunes.apple.com/gb/app/radiation-island/id923760656...
https://itunes.apple.com/de/app/asphalt-8-airborne/id6103919...
Adobe After Effects
https://blogs.adobe.com/creativecloud/after-effects-cc-2015-...
Adobe Premier Pro
https://blogs.adobe.com/creativecloud/up-next-for-premiere-p...