But now, people I work with are making the claim that JavaScript can become a forced requirement for all future websites. In this world, if you're without JavaScript, you might only get a minimal, unstyled skeleton page via HTTP, so that search engines can index the URL and social sites can share it. Or even a blank page, if those things are handle by APIs.
The majority of the UI is then to be implemented with Backbone/Spine, Underscore templates and similar technologies. It will be fully HTML5 compliant, elegant and accessible, but it just won't work without JavaScript.
My question is, do you think the web is ready for this transition? Are there compelling reasons, other than just "historical principles", for this not to happen? Can we consider JavaScriptless users an increasingly ignoreable relic like IE6 users? Are there other key points to consider - are we throwing out some baby with the bath water?