It's also important to remember that Jackson has a lot of mileage on his odometer and when it's over for a RB, it's over... and it happens overnight. One morning they wake up and they don't have it anymore.
For Jackson, that morning could come any day now - for all we know it may have been this morning.
He's still an incredible running back though.
Those tires may not have a shitload of tread left on them but you are mistaken if you don't think he can keep it going for another strong year or two. See: Corey Dillon
Falcons a serious Super Bowl contender next year.