This is backwards. Developing for the web has become a de facto standard because it's the only thing that's universally available. It's the best you've got.
If you want a good universal app platform, we should go all the way back to having something like the JVM as the standard. Or just like, browserless WASM, if we're thinking incrementally.
You might be able to get a headless JVM running on the web using the LLVM backend in Graal and the WASM backend for LLVM.
One thing that's missing seems to be tight integration of the UI aspects, for anything significantly advanced you're going to at least be waiting for WebGPU, and even for ordinary examples cross platform consistency is non-existent.
If you want a good universal app platform, we should go all the way back to having something like the JVM as the standard. Or just like, browserless WASM, if we're thinking incrementally.