Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: With 3D film revenues falling, critics have been quick to point to 3D funerals of the past, but new technology and new investment could see another revival.

Have 3D films had their day?