Very good news! A lot of developers don't like JavaScript and HTML. Google started to listen. I really hope the rest of big players will follow the suite.
Sadly I don't have a lot of time, so progress is quite slow. The PNaCl support isn't working at all at the moment, as I'm going through a fairly major refactoring to make things a bit more solid.
Be careful what you wish for because it might come true. A lot of people don't like the Open Web and are clamoring for something obfuscated. Longer term is lose-lose for everyone.
I don't understand how Web can be "Open" if your choice of language is limited to JS, HTML and CSS that are changing as quickly as standards committee is managing to react. And transpilers are just a second-class-citizen hack trying to make the best of situation.