Major mistake made in Windows 8

Windows 8 is awesome, don't get me wrong, but I think a major mistake made in Window 8 is that they didn't remove the Desktop. You shouldn't be able to just launch it. Wouldn't it be better to launch a Desktop Program like a normal Metro App? For instance: To have Desktop Program 1, Desktop Program 2 and Metro App 1, Metro App 2 listed on the left side App-Switcher Bar. So you could change between all of your programs and apps the same way. We don't need the Desktop Taskbar anymore, do we? Feel welcome to comment ;-)