The group hasn't yet agreed on what shading language is directly digested by the WebGPU implementation. We may provide some helpers in the future to convert WHLSL to SPIRV for wgpu-rs to consume, just like today we provide GLSL to SPIRV helpers, and our examples use GLSL in Vulkan style.

As for the binding models, it's a hot topic. I believe the discussions are converging towards Vulkan-like binding model at the end of the day.