http://anandtech.com/show/9509/vulkan-status-update-will-use-feature-sets-android-support-incoming
Bye, Apple. It was fun getting stuff working on your OSes. Not.
Okay, now that’s just stupid.
Apple haven’t yet said whether they will or won’t support Vulkan, likely they won’t be saying anything until the next major release of iOS or OSX.
Besides OpenGL/ES isn’t going anywhere anytime soon, it’ll be at least a couple of years before Vulkan is widespread enough for mainstream applications to target it as the main renderer.
Well Apple has Metal, why should they add Vulkan? 
Well they certainly do currently have the market position to avoid supporting Vulkan and go it alone by pushing their own API. I suspect work on Metal began long before Vulkan materialised and got the support it has now. The only advantage I see for them to continue pushing Metal is if they plan to use it in some sort of strategy to trap developers on their platform. If they do, dev’s would probably continue to use API’s like OpenGL on Apple products or use engines/library that just abstract Metal away. They do hold a prominent position in Khronos so likely assisted in the development of Vulkan.
Apple is not mentioned in the working group of Vulkan, it doesn’t seem they really had interest. I suspect that all bigger engines will just add another renderer next to opengl, openel, directx and vulkan which will be metal
Yes, they will get a deliciously unoptimized renderer based on their buggy OGL 3.2 implementation from me if I’m feeling REALLY f***ing generous one lonely night. Tessellation, compute shaders, multithreaded drawing and efficient buffer management will be reserved for OSes that aren’t trying to be Microsoft 1.1. No, not even that. If they don’t support Vulkan I will be dropping them completely.
Apple is the cool kid on the schoolyard. He doesnt have to follow your projects, you follow his.
We’ll see. All the money is still on Apple phones and not android, they are still in charge…
Not that I like Apple…
https://dl.dropboxusercontent.com/u/52666052/k.png
Unfortunately still very true 
some more interesting information on Vulkan from NVIDIA: Video & PDF Slides.
Really nice to see that drivers will have to pass proper conformance tests before being able to claim Vulkan support, this is something Direct3D has had for ages but OpenGL lacked (causing odd differences & behaviours in OpenGL driver implementations).
Apple isn’t stupid, they’ll do what’s best for their business.