Not that I own a 3DS or Wii U, I just think Nintendo does an excellent job at promoting their products. If only others (Sony*Vita*) would do the same....
Edit: I understand that Feb 20th is happening... but IMO, I feel that Sony is just hyping up this event so much that they won't have to do another event until E3 and other major shows. Nintendo does it right by utilizing personal, intimate, announcements consistently and frequently when it comes to their products.
Source:
http://www.gameinformer.com/b/news/archive/2013/02/13/nintendo-direct-v-day.aspx