This is strictly a public relations move on the part of the Obama organization. Press releases are issued and the president makes a speech announcing something that was part of the original Status of Forces Agreement to begin with as though it was a new decision that we should all applaud. It's not news. It would
have been news if, for some reason, an announcement was made that our troops will remain in Iraq in significant numbers. But then, of course, the GOP would be guaranteed the White House even if they put Bozo the Clown up as their candidate (which they're damn close to doing with Rick Perry).
What troops will remain will be the standard contingent of USMC embassy guards and other military security and diplomatic security personnel. Possibly a hundred or so advisors to the Iraqui military, now that they're allies. They will be paid the standard rate for their rank, including a differential for hazardous duty, I imagine.
PS -- having said all that, and just so as not to confuse anyone as to where I stand, at this point I'm still an Obama supporter. Nobody else worth supporting has come along the line in quite a while.