I don&#x27;t see this replacing JavaScript. In fact, I believe it&#x27;ll do the opposite - it&#x27;ll make JavaScript <i>more</i> prevalent. If a company can deploy it&#x27;s code to as browser-native blob it&#x27;d make a great deal of sense for developers and designers to be able to code things on top of it. JS is the obvious choice for doing that. And as a consequence, more developers from traditional desktop environments will need to get to grips with 
how to use JS in a browser-WASM-as-a-sandbox situation.