All the Giants have to do is hit Romo, and pressure him all night, and he'll likely hand them the victory. Happens all the time with him. This has been a problem for the Giants in recent weeks though. I expect this game to be close, and if the Cowboys don't have Barber, it might be their downfall. While not as good as Jacobs, he is pretty good at putting the nail in the coffin with tough running to close out games.
By the way, it's official, Jacobs is OUT for Sunday.