What is a CTO?

This has one of the most succinct definition of a CTO role, that I ever saw: "the great CTO’s usually can’t manage their way out of a paper bag, but

• have huge vision,
  
• the ability to pull an all-nighter and crank out a rough prototype of the thing they are thinking about,
  
• have the unique ability to translate complex / abstract thoughts into simple English that a non-technical end-user can understand, and
  
• a willingness (or even desire) to get up in front of 1,000 people and talk about the latest greatest thing they are working on / thinking about."