The unprovoked invasion of Iraq was a national disgrace, and in the history books, it will be shown as such.
All these documents do is make that judgement clearer at an earlier date than many people would have liked.
The person who got this stuff out will be subject to criminal sanctions, and will be a moral hero in the mold of Daniel Ellsburg.
At this point we look at Nixon as a villain, and Ellsburg as a hero. And in the future history books will show Bush and Cheney as evil villains, and the person who released these documents as a hero.
Well, except maybe for the history taught at Liberty University, between Bible study and Creation Science.