Previously one had the task bar and it showed all the different windows in the the workspace. Occasionally a window demanding attention was covered up by other windows, and didn't show up on the task bar, but that didn't happen often. In gnome 3, it is often true that one window covers up the others and one isn't aware of that unless one shows the "taskbar" of Windows on the right.
Am I missing something important?
Threaded Mode
