GWOT takes us wherever al-Qaeda exists
I think there's a very compelling reason to dub this a "Global War on Terror". There is no one country with which we are at war. 9/11 caused us to go to war with Afghanistan, which at the time was harboring the perpetrators of that horrible crime.
Yet al-Qaeda exists in so many other nations that we did not want to restrict our emphasis onto one easily conquerable nation. it wasn't just semantics that made the Bush Administration to dub this a "Global War on Terror". We did not want to hold back our outrage with only one specific nation in mind. We had every intention of rooting out al-Qaeda wherever it may be, because the next attack would not necessarily come from Afghanistan. By declaring a Global War, we left the battlefield open-ended. The GWOT may yet take us to Yemen, Sudan, Syria, Indonesia, wherever al-Qaeda rears its ugly head.
That's why I feel it was totally appropriate to declare open-ended war on terrorism.