I won't be surprised if over the next few weeks we hear about "terrorist groups" and cells being dismantled and obliterated. I'm reasonably certain that the one thing we AREN'T being told is the tremendous amount of information we probably obtained while killing him. I mean, if that was where he was hiding, there was BOUND to be a computer, lists, names, documents, hard drives, something that gives us leads and clues to his organization... usable intel. I'm certain that Al Qaeda will probably try to mount some sort of retaliation, but ultimately the scales have tipped for now into the US's favor.
Also, who is going to step up into his role? Anyone who decides to become the "new leader" of his organizations is going to be measuring his life in days and months, not decades. They'll essentially be committing long term suicide, becoming a major target for elimination (or capture if we run out of bullets during the capture). On top of that, there is sure to be in-fighting as the few brave idiots who actually WANT to take his place start vying for dominance against each other.
I'm really wondering though if we ever had the opportunity to take him alive, or if those SEALS made the decision that dead was better on the spot.