A few years ago I was visiting a music store in Amsterdam with a friend. He showed me a ruinous building next to the music store. When he looked at the building he looked into the future, he saw the building as it has looked like 100 years ago after a thorough restauration.
The power of imagination makes him a successful businessman. One year later the old worthless building was converted in one of the most successful high end clothing shops in Amsterdam.
Whatever you look at buildings, spaceships, software, or guitars, the process of creativity all starts with imagination.