I believe this would be an amazing invention and addition to gaming controllers in the near future! Since it is in the winter months and it has been very cold in my house due to saving money on the gas bills... I noticed that my fiancee's hands get very cold when playing games for an extended period of time. Incorporate a heating element thats dialed into the right voltage and temperature, and problem solved! Biggest worry in sales would be overheating problems or melting issues if not engineered properly though! I know a decent amount about sales and always trying to find new and exciting ways to invent something useful in todays age! Hopefully my idea sparks an interest! God bless!