The promise of WebAssembly is bringing actual large scale applications to the browser.

To be clear, it is possible to build large apps with technologies like TypeScript, with VSCode being probably the standard bearer of this approach, but at Leaning Technologies we don't believe this solution to be viable for everybody.

We strongly believe that more "traditional" languages are required instead to work at scale, especially C++ and Java, and we offer products dedicated to these languages as well: Cheerp and CheerpJ respectively.

Although these languages might not be the most exciting ones, they have a proven track record for delivering large scale applications used by millions of people. Billions of people if the Operating Systems we all use are taken into account.

Thanks to WebAssembly these robust and scalable languages can be used to build Web apps. My own personal metric for the success of WebAssembly is seeing AAA games delivering playable demos as Web apps by cross-compiling (a portion of) the game to the browser.