I look at it this way: Who is our main competition for playoff seeding? Right now - for me - it is Green Bay and Arizona. And if you look at their schedules...I don't see either losing more than 3 games. None of the other NFC teams really "scare" me.
We would need a win at Green Bay at some point in our "run" and it will now have to happen in the playoffs (which...they have been beatable in the playoffs before.) They are running away with the North so our paths will cross again (if WE hold up our end that is...)
The only thing now is: How good really are the Cardinals?? And I am glad (I think...) that we go there at the end. They seem to fold when the pressure is on.