Hrm, a different take on presentations. This reminds me of photosynth and Jeff Han’s multitouch.
The advantage of this slide format is also its weakness. Our visual-perception system is pretty good at making spatial relationships between things, especially if there’s a movement animation between on thing and another. This way, you can demonstrate relationships between things that you couldn’t before.
However, with a single canvas that one pans and zooms around in, you need to make it fit on a 2D page. Something like a network graph can easily overwhelm this format (and every other 2D format. However, this is a small price to pay. We’ve been cramming multi-dimensional information into 2D formats, like paper, for a long time now.