Quote We have had early access to a few apps. I've almost got dota2 working

(still fighting a rendering corruption), but the driver seems to be working

pretty well. I think we're doing pretty good on the stability front, but

driver isn't quite up to the same performance standards as the GL driver.

Not a problem with Vulkan, more that this is a new driver and we haven't

had time to do everything yet.



What's left to be done? Well, there are some hardware optimizations we

haven't turned on yet such as HiZ. There are also a few compiler things

that need to be done. The one big gaping hole is that NIR doesn't have

loop unrolling yet. Thomas Helland was working on that over the summer but

his time was divided between loop unrolling and range analysis and so it

never got finished.

--Jason

Article taken from GamingOnLinux.com.

It sounds like Dota 2 with Vulkan isn't far off, as an Intel developer working on mesa has had access to it.Remember though, it probably won't perform as well as OpenGL when it's first released much like The Talos Principle beta. The first step is to get Vulkan working in games, the next thing is performance.