Currently C++ still wins over Rust, regarding UI and mobile development, specially in what concerns out-of-box experience.
C++ had the advantage of being immediately adopted by the OS vendors for GUI development, although nowadays, with exception of Windows, its role has changed into just addressing the GPU.
So maybe one day we will get something like shaders, CoreGraphics, DirectX, SurfaceFlinger in Rust, but it will still need a couple of years.
Webrender is already something into this direction.
C++ had the advantage of being immediately adopted by the OS vendors for GUI development, although nowadays, with exception of Windows, its role has changed into just addressing the GPU.
So maybe one day we will get something like shaders, CoreGraphics, DirectX, SurfaceFlinger in Rust, but it will still need a couple of years.
Webrender is already something into this direction.