"There always was a tension, if not a bit of a contradiction, in the two parts of Obama's campaign platform to "end the war" by withdrawing all combat troops by May 2010. To be sure, Obama was careful to say that the drawdowns he was promising included only combat troops. But supporters who keyed on the language of ending the war might be forgiven if they thought that would mean bringing home all of the troops.
Planners at the Pentagon say that it is possible that Obama's goal could be accomplished at least in part by relabeling some units, so that those currently counted as combat troops could be "re-missioned," their efforts redefined as training and support for the Iraqis.

In Iraq today, there are 15 brigades defined as combat forces in this debate, with one on its way home. But the overall number of troops on the ground is more than 50 brigade equivalents, for a total of 146,000 troops, including service and support personnel.

Even now, after the departure of the five "surge" brigades that President George W. Bush sent to Iraq in January 2006, the overall number of troops in Iraq remains higher than when Bush ordered the troop increase, owing to the number of support and service personnel remaining."
http://www.iht.com/articles/2008/12/04/america/assess.php

Perhaps, at the moment we can say the surge worked and is a done deal.
And combat operations are being handled increasingly by Iraqi forces. And say by May 2010, there will still be the same number of combat forces operating [perhaps significantly more] but nearly all will be Iraqi forces- which could include all air combat assets.