If you care about something, you want other people to know about it. This means that the way you present your information is important because it can mean the difference between true communication occurring and boredom or confusion. Unfortunately, many presentations (especially at conferences) fail miserably at this task. If you think your content is important, you need to pay attention not only to what you talk about but how you do it.
Many people think that Powerpoint (or Keynote) presentations assist in communicating ideas and facts. It’s true that visual information that accompanies oral presentations can help — but it has to be done well!
Here’s a youtube video of how NOT to use Powerpoint.
And here’s a slide show that shows how creative visuals can supplement (not compete) with the speaker’s words. Ideas and information will be better retained when this kind of dual presentation is employed.