How will WebAssembly replace UI frameworks?
In any case, WebAssembly itself won’t replace Angular or React, because WebAssembly is not a UI framework. But UI frameworks built using other languages, such as C#, Go, or Rust, will almost certainly compete with Angular and React.
I haven't dug into WebAssembly yet, but I'm starting to find more and more articles around it. And I suppose we will start seeing a lot of UI frameworks for different "traditionally backend-only" languages.