A Rust + WebAssembly Fractal renderer, the interesting thing about this example is that it uses wasm in WebWorkers to render in parallel. Although it might not be long until WebAssembly gains ‘native’ threading support, making this sort of thing much easier to achieve!
Ember have embraced WebAssembly, using it within Glimmer, their rendering engine. Should Vue do this same? This interesting GitHub issue debates that exact topic.