Sean Payton live interview on PFT:
(paraphrased)
Mike Florio: So how much longer do you plan on doing this?
Sean Payton: The honest answer I'd probably have to say as long as we have Drew Brees around and we feel like we have that "window of opportunity". But once it no longer hurts to cut players, once the wins no longer thrill, then you gotta start looking in the mirror. But for now, I figure I've probably got at least 5 or 6 years left, and I'm looking forward to signing another extension when that time comes.

So since he never tells the truth, I guess that means he's moving to Dallas next year.