WW2 had an immense importance in the minds of people who lived it. Gulf War... who even cares about it, except for the ones involved? Many people don't even remember that.
Which of the gulfwars are you even talking about? - Even Korea and Vietnam, which were big and had quite some cultural impact, are more and more forgotten.
Although during the 80s and until Desert Storm, the same term was applied to the Iran/Iraq war - which is another mostly forgotten thing despite the huge human cost.
(I realised after I typed the above that the wikipedia disambiguation page also links to the Iran/Iraq war anyway)
