MtnProwler, your arguments are based off of a Worst Case Scenario. We just had 11 inches fall here and at 5 AM it was 4 degrees. Guess what? Schools were open that day and the city ran fine. The chances of a crippling storm falling on the same day as the Super Bowl are slim. The chances of a crippling storm affecting air travel 2-3 days before the game are slim. The NFL is taking a very small gamble at what they're doing. This is a different Super Bowl this year. It's fun, exciting, and unique. People that plunk down the big bucks to go to the game know what they're getting into. They're aware it might get nuts. So they plan accordingly. Just like someone going to a Packers game in February would plan. They'll check the weather and see if they need to change their plans for this once in a lifetime opportunity. Oh, and Denver fans? They'll be there no matter what. Seattle fans? Them too. Sort of like how everyone stood in the rain to watch the Panthers whip the Saints.
You are right, however, a crippling storm will affect air travel, but as I said, that happening is a very, very small percentage. And yes, the NFL would expect you to change your all-important life plans to still watch the most popular sport in North America on TV, and the most watched single sporting game per year on TV. They expect we will adjust, and guess what, we would.
There will indeed be some rain/snow on Sunday, but it's not going to be a bad storm by any stretch. So the gamble paid off. We have good weather computer models now that can predict things far in advance. It's going to be just fine.