The Trade-Off: Why 'Avatar' Won't Spark a 3-D Bonanza

In the past week, 3-D has come to look like the greatest thing for the movie industry since talkies. Avatar, the lushest 3-D movie ever made, just passed $1 billion in global revenue. And the movie-theater industry announced that Americans spent $9.9 billion at the box office in 2009, up 10% from the year before.