Update: CliqTags™, the Web app for managing smart content for QR Codes has been released. Check it out at http://cliqtags.com/.
The most interesting and beneficial application I‘ve found for QR Codes is MMS tickets, to enable automatic reading (and hence secure and immediate verification), if now MMS can be trusted for such heavy-duty use. At least there should be few that don’t have MMS enabled on their phones. An alternative is of course to send an SMS with a link to a page showing a QR Code, but that involves more steps for the user. In any case, there needs to be deployed ways to avoid ticket piracy.
Except for that, QR Codes will not the least be used in advertising, as the presentation shows, but there are also many corporate applications.
In common with NFC, QR Codes provides semantics. See what that entails in the presentation.