
Some of the other things are really neat too, like the slide out options panel. Maybe the top menus (file, render, etc) could all fade into view. It would also be neat if we could rearrange the tabs (tone mapping light layers, etc) on the bottom by dragging them. Maybe an options menu that allows you to set hotkeys for things (for example, increase linear tone mapping)? That could be where the slide out menu comes in. The ability to reposition the tabs all together (you could choose from top, left, right, and bottom by clicking on a hard point and dragging them to a new location where they would snap into place.
Just some ideas.