It's official: Avatar is now the highest-grossing movie of all time in dollar sales, breaking Titanic's previous record of $1.843 billion on Monday. It's gotten a big boost from more expensive 3-D screenings and is still going strong, leading industry observers to say $2 billion or more is possible—particularly since Avatar made its first billion in just 17 days. How'd Cameron pull it off? Four elements: Romance, craftsmanship, good beating evil, and buzz creation. What do you think - how big can AVATAR get? | Continue »