Week 7 was the rarest of all NFL weeks. It was a week with arguably no upsets. When the teams that are favored to win mostly win, power rankings are bound to stay largely the same.
Another factor shaking up the rankings this week is the streaks and directions of different teams. The Bengals and the Cardinals, for example, are both in the midst of three-game losing streaks. Although the Chiefs, Jaguars and Panthers all have just as long or longer losing streaks, they were never high in the rankings to begin with.
On the flip side of the coin, the two teams that really appear to be getting hot right now are the Giants and Bears. Both teams could potentially challenge the Falcons for dominance in the NFC.