Doom 2016 has had some enormous improvements in its performance on AMD cards with Vulkan. Come to think of it, AMD is going to be pushing Vulkan hard too. It helps cover up how bad their drivers are for DirectX11 and OpenGL (though they're very good for DirectX12). And since AMD hardware runs the XBox One and PS4 as well as the upcoming XBox Scorpio, PS4k, and PS VR they might be able to get developers on board. It would be a real kick in the nuts to both Nvidia and Microsoft to see Vulkan get big.