By beating the Dolphins, the Bears have increased their chance of making the playoffs from 67.4% to 76.8%, according to www.makeNFLplayoffs.com.
The site also reports that the team's chance of winning the division has gone from 53.9% to 62.5%. I'm guessing that number will increase significantly if the Vikings beat the Packers today.
If the Bears go 3-3 , they have a 94.5% chance of making the playoffs. They have a 51.9% chance of making the playoffs if they go 2-4 and a 8% chance at 1-5.