This was supposed to be the Nintendo GDC Keynote presentation and a lot of journalists where expecting another round of game trailers and enthusiastic executives, but developers conferences are supposed to be about content creators exchanging ideas so they can all create better games, that is exactly what the Nintendo Keynote was.
You can watch the Nintendo Keynote in it's entirety Here on IGN and it is several things. From a presentation standpoint it is Miyamoto standing on stage talking about his creative vision for gaming. From a content point of view Miyamoto talks about how his wife hates games, his dog, how his creative vision has evolved with several projects over the years he has been at Nintendo and what happened to Mario 128. But from a strategic point of view I think this is a call to any developer making a game for the Wii to create their own unique non-traditional experiences for the platform because traditional games don't expand the video game player base.