Here's a question...
If 1000 people saw a film 10 years ago and it made 1,000 quid profit...
If the same 1000 people see a new film 10 years later (i.e. the present day) it will make more than 1,000 quid.
So which is the box office champion? The first or second film?
Answer - neither - it's a draw. Same amount of tickets sold. The second film has made more money but that's due to inflation, not its greater popularity. This is why you can't say there's an all time box office film. Even adjusting for inflation cannot be seen as wholly accurate. Tickets sold during its first run is the only accurate way to measure a film's popularity.
And this is how the record industry works. When a song reaches number one in the UK Top 40 chart it's based on units sold. It's not based on total revenue but total number of singles bought per week.
By the way, virtually all the top grossing films on the IMDB top ten list are from this decade!
Rank Title Worldwide Box Office
1. Titanic (1997) $1,835,300,000
2. The Lord of the Rings: The Return of the King (2003) $1,129,219,252
3. Pirates of the Caribbean: Dead Man's Chest (2006) $1,060,332,628
4. The Dark Knight (2008) $971,441,786
5. Harry Potter and the Sorcerer's Stone (2001) $968,657,891
6. Pirates of the Caribbean: At World's End (2007) $958,404,152
7. Harry Potter and the Order of the Phoenix (2007) $937,000,866
8. Star Wars: Episode I - The Phantom Menace (1999) $922,379,000
9. The Lord of the Rings: The Two Towers (2002) $921,600,000
10. Jurassic Park (1993) $919,700,000
Three films from the 1990s - all the rest from this decade. Don't you think that's a bit strange? Well it's not strange when you see how cinema prices have shot up over the last decade - therefore proving my point! Even if the original 1977 Star Wars had more ticket admissions than most of the films on that top ten list, it's not going to make the top ten. And guess what, each year it's almost certain a new film will be added to that list. Why? Because inflation keeps hiking up those pesky cinema tickets (and the popcorn too).
US ticket price increases:
http://pioneerplus.ejournalism.ca/?q=node/2745
See how the box office stats become a little meaningless. Within the next five to ten years a movie will open with a 200 million dollar box office. It will happen. The Dark Knight opened huge and it's just a taste of things to come. And the media will claim it's the biggest opening ever when it won't be. The price of tickets will be the main reason.