I don't know why so many people are harping on Nintendo. As far as showing games and actual gameplay I feel they did the best out of anyone who has gone so far. There wasn't a single trailer that was cg with no gameplay. We got a release date for Xenoblade X, more info for Super Mario Maker that included some info on the development process of it and the original game, announcement to try it out at Best Buy, Star Fox Wii U footage and a demo, a cute interview with one of the people involved in Wooly World and more gameplay footage, a new Legend of Zelda, it looks like two new Animal Crossings, a Metroid spinoff that looked bleh, a new Mario Tennis (I was just thinking about Mario Tennis yesterday during EA's), a new Mario & Luigi/Paper Mario game, a new Level 5 game, a new Fire Emblem, and some game called FE.
This was rock solid!