Microsoft's monopolistic powers reach far beyond the setting that we sit in in a government class. They reach even more powerfully to a country that is less wealthy than ours, because they have to work with the giant that is microsoft.
I feel that the decision of the Department of Justice to keep microsoft in one piece is a VERY bad idea, and i think that the idea is more politically based then antitrust based. I am hoping that the EU brings charges and forces a seperation. Which is something that the US is seemingly too weak to todo.