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.
That's interesting, but in viewing the presentation the text is almost unreadable in Safari -- too much space between some letters, while others overlap.
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).
The zoom issue is a security limitation in iOS's Safari: iframes aren't allowed to hide content or zoom, so you cannot hide malicious elements. I've seen the same issues with presentations using impress.js, built using my tool[1]. However, that issue should be fixable by loading the SVG directly (or embedding the presentation inside a div, instead of an iframe.
Try out my iPad app, Imprys[1]. The iPad screen really lends itself to that kind of arrangement, because it's just so intuitive to zoom and pan around.
