Nicholas Tabarrok points out that the movie business is unique in that the cost of producing movies does not affect the price customers pay to see a movie:
One interesting thing that I’ve always found about the film business from an economic point of view is that unlike in any other business I can think of, the cost of manufacturing the product has no affect on the purchase cost to the consumer. For example Honda can make a cheaper car with less features and cheaper finishes than BMW without losing all of their customers to the superior car because they sell their product for less. You spend less to make something, you charge less for it. Makes complete and obvious sense. Not so in the film business. I am an independent film producer and I make films that typically cost somewhere between $5M and $10M. But when I make, say, an $8M film it has to compete at the same price level as the studios’ $80M or $100M film. It costs the consumer the same $12 at the multiplex (and whatever it costs to rent a DVD from Blockbuster these days) for either film. There is no price advantage to the consumer for choosing to see a less expensive film. This naturally makes it terribly difficult for smaller films to find an audience. I find this quite fascinating and I can’t readily think of another industry like it.
It’s an interesting observation I’ve never really thought about. The movie business is probably the most extreme example, but as a commenter points out, the music business is similar, and console games aren’t all that different, either. Most cost about the same amount when they are initially released.