Sorry no links as I just saw this on TV the other day.
Apparently some Japanese folk have created technology to put sensors behind movie screens that can detect if anyone in the audience is filming it with a video camera.
I forget how they said they were able to do so technically but they are trying to get them installed in all movie theaters in Japan within the next 3-4 years.
If they become widespread in Japan perhaps other countries will follow along and one day it may not be possible for pirates to "steal" movies as soon as they hit the big screens...
Probably not, but will be interesting to see how this new technology changes things.