What did Steve do during the Apple events? Three main things. He had style, he had a story, he didn’t get too deep in the details. Do these things and your demo won’t suck.
Have some style. Be memorable. Stay classy. Never need the sale more than your soul. We have all been sold to by both types of people, those with class, and those without. Who do you want to be lumped in with? Me too.
Help me help you. That is what a demo story does. Helps me help you understand how you will use the solution. Features don’t sell solutions, using features to solve problems do. So explain how the solution is going to be used, in an easy to understand, non-technical way. Talk to people, they wont bite.
How many details are too many? 20% less than you think. I just made that up, but I bet it is right. We think it is cool. Hell, I KNOW it is cool. Cool only sells if it is something that solves a problem and can be put in the story. Have enough details to answer their questions, not so much that you start answering questions they didn’t have, until now.
So thank you Steve Jobs for teaching me lessons neither of us knew we were learning.