I like how he says that "mobile web apps are slow and always will be" (not a direct quote), but then dismisses asm.js as "it woudn't be a JavaScript anymore" so

I like how he says that "mobile web apps are slow and always will be" (not a direct quote), but then dismisses asm.js as "it woudn't be a JavaScript anymore" so it doesn't count. The point of asm.js (if I understand it correctly) is that you can use JavaScript in way similar to Python -- you can make your application in high-level language, and then, after profiling, rewrite the performance critical parts into lower-level, less powerful, but faster language. That means, it still is "web app" but it can perform reasonably.