After setting the record for most Blu-ray discs sold in a single day, the fact that Avatar is now the biggest selling Blu-ray of all-time should surprise exactly no one. In just four days, the highest grossing movie ever sold a ridiculous 2.7 million Blu-ray discs, which is more than previous record holder, The Dark Knight, sold in 16 months. Of course all these records beg the question: If it weren't Avatar, what would people have spent their disposable income on during the past four months? [LAT/Company Town]