I loved the Nintendo conference because it showed Nintendo is genuinely still pushing for interesting gameplay, as well as unique visual styles that we haven't seen before. They are using their major brands as a way to experiment with new gameplay ideas, rather than just pumping out iterative sequels.
We saw Yoshi's Wooly World which has elements of both Yoshi's Story and Kirby's Epic Yarn, but also looks to bring in new gameplay and visual ideas. It looked absolutely gorgeous, and used HD graphics in a different way than we usually see. You can tell the lead designer is really passionate about unique game play and fun elements. It may not be trendy or exciting to a lot of you, but that's the sort of design ethos that I wish we saw more of. I remember Shane B. calling Kirby's Epic Yarn a "baby game" but that is so dismissive and discredits genuine creativity.
Then we had Kirby's Rainbow Curse which is an unexpected sequel to one of the best "hidden gems" on the original DS. But it isn't just a bland sequel, they brought a whole new visual aesthetic to the game, as well as what appears to be a lot of new folds to the game mechanics.
And you've got Mario Maker, which looks to utilize the Game Pad in a meaningful way to deliver a level editor that is fun and easy to use. We see Nintendo taking an idea that has been done before in games, but bringing a level of fun and accessibility to it that will hopefully lead to some awesome stuff.
Finally you have Miyamoto's experimental Wii U prototypes that are showing a lot of effort to use the Game Pad in interesting ways, both single player and multiplayer. Star Fox might even build unique controls into a full fledged action game, but we'll see about that.
The most important thing is that you have one of the most powerful members at Nintendo actually working to build novel game play experiences. That is so cool! That is why Nintendo had my favorite conference.