I'd like to see this too, but it's quite unlikely (it could have already happened with WebGL), the developer experience won't be much different than writing a n

I'd like to see this too, but it's quite unlikely (it could have already happened with WebGL), the developer experience won't be much different than writing a native app on top of one of the native cross-platform libraries (like SDL2, GLFW or - shameless plug - the sokol headers).