And can we just state the obvious reason why this will NOT happen?
Until China gets the pollution under control, there's no way the Olympic Organizing Committee will even consider hosting a winter Olympics here. It's easy to get rid of the pollution in the summer, by shutting off factories, but how are you going to shut down coal burning heating in the winter to stop the pollution? Will everyone have to freeze for the time of the games so there's blue skies? When China can get control of pollution in winter, then they can try again, but for now, they need to focus on the problem at hand.
And I second all the reasons admin listed above.