So I just got a chance to mess around with Doom after the Vulkan patch, and the results are nothing short of stunning. I experienced an increase in performance far higher than I could have possibly expected. In the most demanding scenes in Doom, my framerate went from 30-40fps to 60-70fps at the absolute highest possible settings it can go. Vulkan, and any other low-level API's are showing a LOT of promise. Sadly anyone who owns an nVidia graphics card will get pretty much no performance benefit.