I thought this was kind of humorous. From /.
http://games.slashdot.org/games/07/09/24/1247245.shtml
http://games.slashdot.org/games/07/09/24/1247245.shtml
"Vyro Games, a Dublin Ireland company, unveils a device today that forces you to relax while playing games. It is called a PiP, or "Personal Input Pod," and it measures things like the moisture in your hand to assess whether you're stressed. If you're showing signs of stress, your performance in a game deteriorates. If you relax, you do much better.