The important bit is that HTML5 is a set of standard abstractions around complicated things, such as networking and data-storage, that should almost never be re-built from scratch by the developer.

It is extremely important that we build standards around these things. Unfortunately, it seems like these abstractions are only accessible through a JavaScript DOM environment, which makes them sort of useless if you need/want another language.

I think we need languages agnostic standards. That's at least my idea of the future of the web and desktop development.