Read original post by Andrew Duthie at Devhammer's Den
One of the nice features of the new JavaScript Windows Metro style app templates in the Visual Studio 11 beta is that they provide built-in support for databinding, using sample data in a JSON array. Folks who have experience in the XAML world may not see this as a particularly big deal, since Silverlight and WPF have supported databinding for a long time.
For web applications, however, data binding is still a concept that's evolving. While there are third-party libraries like Knockout.js that provide client-side databinding (and my fellow DE David Isbitski recently published a blog post detailing how you can use Knockout in a Metro style app, if that's your cup of tea), but in general the web world is a little behind the curve compared to XAML-based databinding.