It is my feeling that you're trying to justify the 
    usage of Node.js

I said nothing about Node.js. I said I want a framework on the client-side for the same reasons I want one on the server-side. A framework. Like Rails. For the client-side. So I can have organized code that people other than me understand.

    wikipedia

Wikipedia is a content site. I'm not talking about content sites. I'm talking about web apps. There's a huge difference. When I need a blog or a CMS, I guarantee you I'm not reinventing that in Rails. I'm using one that is proven and already solves that problem. And that's a whole other area of discussion. There will always be static pages. Those are the majority. But nobody should be serving those directly from a database. Those should be coming from disk or a cache or something.

I'm talking about interactive user experiences. In web apps.