The TED curator, Chris Anderson, gives a great example of how visuals are meant to only supplement your "naked presentation". He doesn't depend on slides. He's telling a story. His visuals were built using Prezi. He tells an impactful story about the power of the internet in sharing innovation from all corners of the world.
This got me thinking about how I really should minimize my Powerpoint slides. This is a great illustration of "less is more".