The take I'd really like to see on HTML5 presentations is making them easy to author. If not by end-users, at least making it so there's no layout micromanagement involved.
It uses SVG, and Javascript for animations.
If it works in Chrome, Firefox and IE... what's Safari doing wrong here? Oddly I just checked it on the iPhone and it seems fine there (although zooming out seems to be blocked, so the presentation is much too large for the screen).
[1] http://imprys.com/ or http://itunes.apple.com/us/app/imprys-lite/id523769425?ls=1&...