Why HTML/JavaScript/CSS are not compiled languages and will they ever be?

Question

Why HTML/JavaScript/CSS are not becoming compiled languages (or maybe even merge into a single compiled language)? What if browsers were running \"Browser Virtual Machine\" and

Answer 1

I think your idea is sound, however there's still no way to enforce a standard. Thus if there was a non-supported feature, there's a good chance the entire page would simply not display anything. In the current setup, critical information can still be passed.