Just about all of the actual games that they showed off at E3 2011 became actual games: Chase Mii and Battle Mii became Mario Chase and Metroid Blast in Nintendoland, the pirate rhythm game is going to be in Game amd Wario, and NSMB Mii is NSMBU. Ghost Recon Online seems dead now though, and there there was a little competative drawing game that didn't get much coverage. As for the Bird and Zelda Demos? That would be cool for a bit, but I would eventually get bored with it.
I think he meant that during the conference the demo's will be available for download at home.
Being playable until the conference ends.
I also think he confused it with last years Blizzcon where they talked about such an idea.