Mike,
There is absolutely no way the Giants run the table and the Cowboys lose out, so relax. The Giants will lose at least one of the two remaining road Division games, nobody ever sweeps the road Division games. Frankly, the way the offense is playing, I wouldn't be surprised if he Giants lost out. Unless the Good Eli surfaces, and the receivers get cured of a bad case of the dropsies, the Giants offense is in bad shape.
My biggest concern, if I were you, is Dak Prescott's confidence. He has basically had three straight poor performances, and should have lost the Vikings game. Its just growing pains, or the rookie wall, the kid is going to be good for a long time, but right now his confidence has to be ebbing, a lot of people are calling for Romo, and he plays another very hot, very tough defense in Tampa Sunday. I want him to beat Tampa, and take the heat of the Giants in the wild card race (I think if Tampa loses, and the Giants manage to beat Detroit, the Giants are almost assured of a Wild Card). If he doesn't play well, and gets pulled for Romo, that's the only way I see Dallas potentially choking down the stretch (Romo will need a couple of games to get up to speed, and he is terribly injury prone).