Many folk commented about how it was great to see the confidence with which speakers like Stephen Heppell can throw away the PowerPoint crutches that so many of the rest of us are still hobbling along with. An interesting example of presentation using a statistical representation system (Gapminder) was the talk by Hans Rosling (Professor of Global Health, medical doctor and researcher at the Karolinska Institute in Sweden - oh, and an amateur sword-swallower!) at the TED conference last year. Just look at these lovely statistics!
If you want to see some really amazing examples of what you can do with 'multi-touch' (mentioned in one of the talks), then have a look at this, also from TED last year. Now Microsoft have just released their 'surface' - also worth a look. Much better than your average coffee table - every student cafe should have one!