A technical preview of the Vulkan API, with advanced techniques and live demos of real-world applications running on Vulkan drivers and hardware.
Gabe Newell on Vulkan:
Valve and the other Khronos members are working hard to ensure that this high-performance graphics interface is made available as widely as possible and we view it as a critical component of SteamOS and future Valve games. (source)
Road to VR is also liveblogging here.
If you're interested in all things Vulkan you should probably follow their liveblog. We'll be focusing on Valve related things.