Nintendo stuff is happening right now
Netflix will eventually stream 3D trailers and other videos to the 3DS. That's nice. nvm, I think Netflix is regular, then Nintendo will have its own service to stream 3D trailers/videos.
3D video recording too, maybe, possibly, who knows.
3DS Virtual Console includes Gameboy, Gameboy Color, Game Gear, and Turbo Graphix.
Online stuff is all in May (web browser, other stuff)
New 3D Mario from the Galaxy people. Logo has the Tanooki tail from SMB3.

There was a new Zelda Skyward Zelda trailer too. Main takeaway was showing the villain or another character or something. Looked nice.
[youtube=560,345]m0xl-SFyG9Q[/youtube]

(< Not a photoshop. really.)
haha they're playing muse. what dorks!
if you care to rewatch this, it's streaming again:
http://gdc2011.nintendo.com/ (don't bother)