I have been thinking about user interfaces a lot in the back of my mind. I think that most applications could be made much more usable if the user actually had

I have been thinking about user interfaces a lot in the back of my mind. I think that most applications could be made much more usable if the user actually had an idea about what kind of data the application is actually handling, where it's getting it and how it can be manipulated. What I would like to see is an UI that can represent any kind of data within a consistent framework of GUI-widgets or whatnot. Everything in the UI should be searchable, inspectable,sortable and otherwise manipulable via some real programming language.