Speaking of path tracing, I hope Khronos keeps an eye to the future for Vulkan in regards to supporting path tracing. I don't think we're too many years away from seeing gaming engines or graphics card makers support path tracing in a big way (mainly because I think it's the future of gaming, especially for VR gaming - which is also the future of gaming itself). Vulkan should be optimized for that from the beginning and not tacked-on later.