Here's my personal take on this.
Saddam operated as the God-subject of a cult of personality. This really is a case where if you "cut off the head, the snake will die". Without the subject of the cult's reverence to rally behind, there's really nothing left for the dead-enders to do but try to escape to Syria, stand down and try to blend in to the population (and the population knows who they are), or to join forces with the foreign fighters allied with Al Qeada.
I think we can expect a quick end to the "resistance", except for the foreigners. And I have great hopes that the liberated Iraquis will now deal with them.
Ths is a beginning of the new day for Iraq.