@ Kytim I knew what you meant, I was just giving you a hard time. My apologies
I am doubtful that Nintendo will distribute these digitally, despite the general feeling that they will. Don't get me wrong, I truly hope they do release them digitally, but one never knows what will spur Nintendo towards doing or not doing something.
I can see Nintendo getting nervous about piracy, and choosing cartridges as the "safer" medium, regardless if this is true.
I can also see studios wanting Nintendo to give them shelf space. Sony continues to sell physical UMDs with movies despite the fact that movies can also be purchased through the Playstation Store, perhaps for similar reasons. Although movies for PSP via the Playstation Store may be a recent thing, I am not sure.
Nintendo wants it to be easy to enjoy their products, and while a digital download may seem intuitive to us, it sure isn't to everyone that will be buying the 3ds or 3ds software. Nintendo may also reason that some of their customers may not have access to downloads, seeing as they continue to support wifi spots at Targets, Best Buys, GameStops, etc.
Nintendo also goes for that Christmas morning customer base, and who wants to get a download card under the tree? Well, besides us.