"Gorilla arm" is a term engineers coined about 30 years ago to describe what happens when people try to use these interfaces for an extended period of time. It'

"Gorilla arm" is a term engineers coined about 30 years ago to describe what happens when people try to use these interfaces for an extended period of time. It's the touchscreen equivalent of carpal-tunnel syndrome. According to the New Hacker's Dictionary, "the arm begins to feel sore, cramped and oversized -- the operator looks like a gorilla while using the touchscreen and feels like one afterwards." https://www.wired.com/2010/10/gorilla-arm-multitouch/ https://www.wired.com/2010/10/gorilla-arm-multitouch/