Add a tiling window manager, like Eclipse or Visual Studio have

Qt should have a real tiling window manager that allows users to arrange windows like you can in Eclipse or Visual Studio.

If you're not familiar with the concept, here is a video describing it: http://www.youtube.com/watch?v=EWfHcyB4anE&t=1m50s

Here is my feeble attempt to capture it in words:

I think this would work much like QMdiArea works now, but with a different arrangement of the windows.