many programs in ubuntu have more than one window. for example, if you install software with synaptic or you use gimp, you always have more than one window of the same program open.
if you want to move the program to another workspace, you have to move each window for its own.
10GUI introduces a revolutionary new and extraordinarily simple idea for window management and human interfacing.
It has two parts, the Window Manager and the Multitouch Keyboard. The Window Manager part of it is achievable more easily than the Multitouch interface.
Ubuntu should be more visually-stunning, and a small idea to increase this would be to have menus and tooltips fading out very slowly - say, over 800ms. The current length of the fade-in is fine.
You could possibly have the notify-osd using the same length of fade time.