I just recently started using Prezi, and I love the architecture it has for visually demonstrating the relationship between ideas with the zoom, pan, and rotate system. Being able to fade in content is also a great feature.
There are a few more I’d really like to see:
it would be really helpful if for each path (or content animation (fade-in)) if you could select the path with a pop-up menu allowing for an auto-play action for that path with a selectable delay in action. This would permit a view move followed by a fade-in without requiring a second click to have the content show.
while most of the time, it’s not a significant issue to have content that has faded in to remain… there are times when it’d be handy to be able to have content fade out as a separate item (although delayed action - see above - would be incredibly useful as well).
other content animations similar to PowerPoint’s would be useful - just a few more like fly-in, grow, spin, bounce, and drop etc… plus a way of doing exit effects would add a hugely powerful capability. I’m sure I’m not the only one who’d be willing to pay extra for premium effects.