Not DVDs, in the movie theater: Each visitor get to enjoy the movie in their home language.
How?
Anyone has a mobile phone today, right? The audio system of the theater will only play the background sound, all the voices are transmitted via WLAN to each individual phone.
People can then listen to the voices of the actors with their own headphones.
Additional bonus: No audible ringing and everyone can tune the volume of the voices to their liking.
Dark Views 