Tell me about the impact it will have on their lives. They walked out with a great speech, supported by PowerPoint for added illustrations. Usually we put together 40 PowerPoint slides and then decide what to say in between. That's exactly the problem. Misuse of technology can turn speakers into mere readers of captions for slides.
Personal communication is lost.
Even the Pentagon has taken a stand against slide-dominated presentations. Here's another business example. It was near the end of one of my all-day speaking school and coaching sessions for engineers. Everyone there was very proud of their expensive, colorful presentation materials and expected to rely heavily on them. I had been demonstrating the relationship of organization and content to delivery, emphasizing that stories are the currency of human contact, the only way to connect emotionally as well as intellectually.