The leading answer seems to be that movie audiences are getting savvier with their money. They aren’t ponying up the extra bucks for a 3D movie just because it’s in 3D anymore. “Audiences have said time and time again that what they’re looking for, and what has been proven to have done well (in 3D) is action-adventure-fantasy movies,” Vincent Bruzzese, president of the World Wide Motion Picture Group, told The Wrap. “There’s a question of ‘Why is this in 3D’ and ‘Why should I pay the extra price to see it?’” (via Have the Glee Kids Finally Killed 3D Movies? – Entertainment – The Atlantic Wire)