Easy. The Cardinals sucked after dominating the first half. Bears special teams and defense kept them in the game, while the Bears' O-Line continued to be embarrassed even late in the game, resulting in 2 lost fumbles and rushed throws for Grossman. However, Grossman did suck even when given time in the pocket, and threw a couple ugly INTs as well as some additional passes that should have been picked. He's lucky he didn't end up with 6 INTs.
After the Cardinals blew this game, there was no hope for this team. Like See Red said, Kornheiser is right.
As for the '85 Bears, this team can't be compared to them until we see what they do. The Bears could definitely make the Superbowl but after watching this, teams like the Panthers, Saints, Giants and Eagles could give them a tough time.