If the Saints win next week, even in a close game, I think this team makes the playoffs and wins a few games in the playoffs. Beating the Super Bowl Champs in their house, regardless of the Steelers' record (and I think they're still a better team than the record indicates), I think would vault this team's confidence and garner some of the national attention (posititive) which fans have been looking for.
Beat the Steelers next week, and I think analysts will regularly reference the word "homefield playoffs" and the Saints in the same sentence.