This presentation that I found today on SlideShare is not about about presentations, but about application design for the iPad. Still, it deserves a mention on this blog because of the fundamental philosophy of the designer: each user interface deserves its own kind of design approach: the iPad is not an iPhone, is not an iPod.
Stanford CS193P - Designing for iPad
The same is true for presentations, different audiences, different settings, require a completely different presentation (earlier post): cosy meeting room, big audience keynote, SlideShare document for online viewing, one-on-one with a venture capitalist, etc.
I think iPad-like user interfaces (like the one Tom Cruise uses in the movie Minority Report) could turn the world of presentation design upside down. Early thoughts here.