MM probably knows he's done. He's got a bunch of kids that have only lived in Green Bay that are now going to have to move. I'd be sick if I was him as well (besides knowing you've probably blown 2-3 games this year based on mismanagement).
He was the anti-Holmgren in many ways. MM could have won 5 Super Bowls and he'd have never wanted to leave GB. Holmgren wanted out as soon as possible. Holmgren was creative, MM valued continuity above all else.
I wish him well in Cleveland. We all know it's happening.