Two Programs, Two Different Viewers, One TV

Wow, this is awesome. Basically two people can watch two programs by looking at it from different angles. That, is awesome. I always thought picture in picture was annoying for both viewers. Having to ignore one screen. *Click Here*
I don't have the article on hand, but I remember there was this directional sound speaker. Basically it focuses a sound wave in a specific direction only. And people outside the direction of the sound wave, don't hear anything. Amazing really, I wish I had the link. But that would be perfect for this. Two recliners, one tv, watching a different show and both can see and hear clearly.