Barring the Zombie Apocalypse, I think our threat from Osama is over. While the threat from Al Qaeda is not over, the loss of Osama does present us with strategic opportunity. There is now a power vacuum that could result in anything from destabilization to a somewhat of a civil war within the group. It seems that the end of this mission is near and we can soon bring our troops home and have one less war to pay for.
Politically, it probably resulted in an increase in Obama's approval rating and provides him with a campaign point
Aside from the power vacuum, what else has changed?.