Very interesting. I have some questions thou.

How well does this play with web searches? Do I will be able to find a Qt application searching for words on its interface? Do we need a store like https://addons.mozilla.org/ to find the content?

And, mainly, is this going to substitute all web information or just will move desktop apps to the web?

I would like that documents continue being documents, and applications should be applications. But, like with Flash, many people may disagree on that point.