A lot of nothing. Everyobody has known since the 60's that civilian airliners are a primary target of terrorists. To say that Al-queada is targeting them is to say nothing more than that they are following in the steps of their predecessors (Arafat, et al).
Since the report does not give specifics of how the planes would be targeted or used, means this is not actionable intelligence, just a general warning to expect more of the same.
If this report is a smoking gun, then someone has been smoking controlled substances.
But there are still some unanswered questions to me
1: Why the FBI HQ resisted opening a broader investigation after it catched Moussaoui?
2: Why did the government’s Justice Department plus top FBI officials blocked an FBI request for a national security warrant to search Moussaouis laptop?
3: Why Ashcroft has been advised to travel only by private jet instead of commercial airlines a few days before 9/11?
4: Why there was no reaction to the very precise warnings of several foreign intelligence (Israel, Russia, Egypt, France, British, Jordan) ?