From what I've seen speed isn't usually the issue with Electron based applications (except Atom), the issue is every other performance metric; memory use, disk use, start up time, etc. How will WebAssembly help here? Will it allow Electron to cut its memory use or startup time?
WebAssembly could become the universal crossplatform language and that would open up a lot of possibilities.
From writing a hybrid app and replacing all the native parts with it (so Node in Electron), to even writing everything with WebAssembly and using native GUI.
It is already possible to remove Node and Chrome from a hybrid app by using webviews and Swift in macOS and C# in Windows. We're developing a crossplatform app using that technique and it's awesome. With WebAssembly the native part could be completely crossplatform with comparable performance.
The only project I know that does this is NodeKit but it seems to be a bit abandoned.
