This concept of 'JS all the way down' is what hooked me on Titanium Mobile (crossplatform app framework) as soon as I started using it. It's a much lighter cog

This concept of 'JS all the way down' is what hooked me on Titanium Mobile (crossplatform app framework) as soon as I started using it. It's a much lighter cognitive load, since I'm not constantly switching between varied featuresets and syntax of templates/HTML/CSS/JS. One of my favorite features, is that any piece of the app can instantly become a reusable, extendable module for another app. Since it's 'just JS' it always ports. In this way I share UI widgets between web apps and mobile apps. Generated CSS and HTML should be syntactically perfect, and JS has much better error handling than either CSS or HTML. With those traits, the resulting code can be better than a human could write on their own. The concept of JSON syntax for DOM creation has been around a long time -- HAML, JsonML, jQuery... And although the JS syntax can be verbose, CoffeeScript object notation is available, and quite similar to HAML and SASS. I hope we see a lot more of this.