Well the death of Bin Laden might be a big thing in the United State, because the administration and the media there mader him "the main bad guy". But all in all I do not think he was that important for Al Kaida or other terror organisations, neither do I think they are really crippled by his death.
Said that, I do not think this is compareable to the news of Hitlers death, that news does not only mark the death of Hitler, but the end of the biggest military conflict in human history (at least in Europe, but without any allies the defeat of Japan was just a matter of time)
Alltogether not that big news.
regards, Sebastian