Can’t f ind it in theaters? Try on-demand.

BCDF Pictures and Gary Sanchez Productions

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It’s true, Hollywood movies are getting bigger and bigger. They play on IMAX screens and in 500-seat auditoriums. They’re frequently cultural events first and narratives second.

One recent Saturday, “Iron Man 3” was on 12 of the 32 screens that make up Boston’s two multiplexes. And over at the Kendall Square ‘art house,’ scheduled screenings of some well-reviewed independent films were canceled so that “The Great Gatsby” could play on multiple screens simultaneously. More and more, a key question facing moviegoers is: Where did all the movies go?

In many cases, they’ve gone to your cable box. Or to your computer, or to your Xbox, or to your iPhone. It’s called VOD — video-on-demand — and many seem to think that it’s the future.

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