Interesting. Surely, you don't need slides. But I understand that powerpoint has its limitations and you may need to use another "presentation" software.

What about Prezi (http://prezi.com/). You can make presentation in more flexible way because of "zooming" concept. Its really ackward to fast forward slides in Powerpoint, but it seems very natural in Prezi where you can focus just on details you want to show your audience, by "zooming" to charts/lists/pictures you want to emphasize and eventually zoom-out to see the big picture.