If I understand correctly, the consequence is that, Electron being a wrapper around a fully capable browser engine, Electron users are free to use WASM modules

If I understand correctly, the consequence is that, Electron being a wrapper around a fully capable browser engine, Electron users are free to use WASM modules so long as they expose a JS interface to interact with Electron's API where neccessary but until WASM gets DOM bindings I presume that Electron itself won't use WASM to implement internal behavior.