It has been a cold Christmas for many across the United States and Canada, where a prolonged winter storm left almost 1.5 million people without power and resulted in several dozen deaths. The weather outside is frightful, and many people have chosen to remain home (where the fire is so delightful), rather than venturing out to see the latest James Cameron title. And yet, "Avatar: The Way of Water" has nonetheless added another $64 million to its domestic box office total over the holiday...