Let's think up potential 3D apps you would like to see on 3DS.

[ZaP~]

Skype and a Youtube app'd make my life happier.

Netflix could be cool too.

I'd like that Pokemon TCG could take a step ahead as implementation, on 2002-2004 came the e-sets that were compatible with e-reader. They could complement with Pokedex 3D or add cards on a 3DS Pokemon TCG game. That is based on sets were your physical cards could be playable on the online game and being able to play online. Even trade over Streetpass!!

But maybe that is more like a full 3DS game more than an app xD