Hehe, ever heard the "if an os was an airplane" anology?
In it, dos is the airplane that takes off, flys 5 miles, needs to change directions so it lands, points the plane in another direction and takes off again, only to have to land and change direction again 5 miles later.
In other words dos can really only do one thing at a time (tsr's excluded) so it's extremely inferior to windows.
Just thought I would add that in because it's rarely ever bought up in a dos vs windows debate. ;-)