Jordy Nelson is the real deal. He absolutely burned the Bears secondary on the long pass down the middle. Add Jennings to the mix and I say the Packers are very formidable even without a running game. The weather factor will be interesting since it should affect the Packers as much or more than the Saints.
That was against a cover 2, bad coverage pickup by the bears, Nelson was working 1 on 1 against a safety. The most impressive thing about the play was Rodgers reading the coverage, but after that, the bears were already beat before the snap.