^Well yes, there are several serious points that come from this.
There's obviously the threat of retaliation. The US (and the rest of the countries fighting there too I guess) run the risk of getting complacent. Now I know they won't, the leaders aren't that stupid, but even civilians could get very relaxed about it. In reality this could actually be a worse time for security.
Next there's the obvious fact that whilst he's the leader, he's not making every decision and authorising every attack. It's like the President, he will authorise some of the bigger missions, but daily deployments and missions are likely to be planned and run by people much lower down the ranks. I think the same is true with Al Qaeda. The other problem is that his post will soon be filled. The leader of an organisation like that mostly acts as a figure-head, a symbol of the organisation. I don't think much will actually change.
Then there's the issue of where he actually was hiding. It does seem a little odd, but I don't really have much of an opinion on it to be honest. As for burying him, I'm kinda of the opinion that the troops/countries that have the body will actually bury him properly. It's quite a thing to be able to treat your enemy respectfully, even if he was a massive ****. I can't say for definite obviously, but I think they'll be surprisingly respectful with his body.
Whichever way you look at it, it's great news, but I think caution still needs to be taken.