NetBeans 7.0 in online edition, rewritten in javascript !

Could it be true?! I could never guess this kind of connection javascript with NetBeans IDE. As others developers, I cant wait to see it online, but to be honest, I'm wondering how they, and would they improve javascript to make something very useful as NetBeans is, because, as we know, javascript is nice, but not so much powerful 'programming language'.
More about announcement you can read at famous netbeans evangelist Roman Strobl at his blog.