Three paned view with columns?

I like the three-paned view very much but think it could be even better if the upper pane could also include columns. The columns could be used to display contents of nested folders and files. The problem with the column view now is that it only displays icons, not contents. Since the three-pane view can already display contents, I trust it wouldn’t be too difficult to have columns in the upper pane (or upper right) and still display content. Hope I’m not missing anything here.