Maybe still a bit too early days, check back in a year and pray every day Intel doesn’t abandon their Mesa open-source contributions.
It’s DLCs for your graphics card drivers 
/s
Until then, yeah performance likely isn’t going to be great in DXVK games. Performance in llama.cpp might be good though, with the SYCL/oneAPI stuff mentioned above and in other threads.
A lot works and a lot doesn’t. The core compiler is there (spilling, scoreboarding, SIMD32, etc should more or less work), but there are details to fill in for both performance and correctness. We essentially pass conformance on OpenGL ES 3.0 and OpenCL 3.0, and we’re busy iterating on Vulkan.
Also see the other threads on the forum about SYCL and oneAPI stuff: