Lite UI idea (w/ images)

This is my photoshoped idea of a lite UI.

Current UI:


New UI:
Normal______________Lite


Basically the windows should have a button, Similar to Windows Media Player and MSN Messenger, to hide all the wasted space. Once hidden you could double click the window (or right click or something) to bring the borders back. The skill bar's borders would be swited in the options.

I would like an option to get rid of the fancy but unnecessary borders, but I don't know how much of a priority that is.