Leaders from the movie theater industry gathered at CinemaCon in Las Vegas this week, where vendors showed off the latest concessions and gadgets for movie-goers.

An curved arrow pointing right. Movie theater chains like Regal and AMC make huge profit margins on the sale of food and drinks at the concession stand. Without these gross profits both companies ...

it's been a movie-theater staple since the Great Depression). While theaters will likely never run out of popcorn, some candies that used to be concession-stand staples are now harder to find.