"Discovering New Development Opportunities"
If the GDC is all about new technologies and Nintendo are relating it to "Discovering New Development Opportunities" then I'd say they'll focus on a few things.
1. Wii MotionPlus: How the device enhances the Wii Remote and the possibilities it brings.
2. DSi: New features such as the cameras and the on board memory. May touch on DSiWare and WiiWare. Also may speak about the new motion sensing DS card.
Apart from that, they could always talk a little bit about the Wii Balance board or even the Wii Zapper.
That patent is another possibility but something I highly doubt.. The best thing we could hope for is them using an unannounced game to show off some of the things they're going to talk about. That or showing gameplay of announced games we don't know much about i.e. Punchout!! etc
