The Steelers have their final two games at home against the Bengals and Browns. They have a much better chance of winning both of those than the Ravens do of winning either of their final two games. Ergo, I think the Steelers are now going to win the division. As much as I despise them, they probably deserve to do so as they beat the Ravens on their home field with their third string QB playing. The Ravens IMO don't deserve to win the division.
Of course there is also a possibility of the Bengals beating both the Steelers and Ravens and winning the division. While I think they can undoubtedly beat the Ravens the last game at home, I find it a daunting task for them to beat the Steelers at Heinz field.