People don't realize how profound and important this concept is. Apple's entire business model was taking ultra-complicated things and making them so simple your grandma could use them. Steve Jobs said "You want to find an industry that's ripe for disruption? Find a product that's too complicated and simplify it."Walk him through it as simply as possible. Infograph, etc. Having something that does some technical thing is neat; selling it successfully to non-technical people is a business.
Think Wozniak sitting in the back of the Computer Club playing with his plywood computer vs Jobs swirling into a decision maker's office eating a piece of fruit and breaking down how this contraption would eliminate typing pools.