The season is a marathon, not a sprint.
The Eagles aren't going undefeated, and the Cowboys should win some big games later in the season.
This game is simply an early season measuring stick, not an indication for how this entire season will go.
And even if the Cowboys win this game, Philly is still favored to win the East, and the 49ers may still be a higher seed than the Cowboys. It's one game of many. Hec, the Cowboys could beat the Niners, and then lose to the Chargers and Rams. Haven't we learned ANYthing over the past few seasons?