Nintendo knocked it out of the park! Shaky start with Zelda control issues but then Metroid, Donkey Kong, Epic Mickey, Goldeneye on the Wii
The 3DS with Kid Icarus looks gorgeous and they had interviews with developers including Kojima, who is making a Metal Gear Solid on the 3DS.
Strong press conference, maybe one of their best.
EDIT:
Announced games for the 3DS