I am putting various inventions up on this blog. See my original post Inventions. Today, many TVs essentially show two pictures at the same time, in the interests of a 3D experience. It would not be difficult to split the 3D into two pictures for two viewers. There would be a purpose to this, although human psychology would determine how successful it might be. One could obviously have two people watching two separate programs at the same TV -- say, their favourite sports -- with the ability to switch instantly to what their partner is viewing. Or one could enjoy two-player games, such as Scrabble, aerial combat, or tennis. And one could have two-part tutorials, for instance to teach a duet or to practice training manoeuvres. There might be further ideas.