WASM is literally a direct replacement for asm.js. In fact, for a long time emscripten supported both simultaneously - both as outputs from the same tool chain.

WASM is literally a direct replacement for asm.js. In fact, for a long time emscripten supported both simultaneously - both as outputs from the same tool chain. They have a lot in common. So it's not at all wrong to say WASM fulfills the prophecy. It's an iteration of the concept that resulted in JS as a compile target and later asm.js.