For as new as the system is, the 3DS seems to be putting enough 1st party games out. I'm actually kinda shocked. Of course, Zelda is a cheap out release but they are releasing a Mario Kart, Mario Land, Star Fox and Kid Icarus in the near future. They also are set to come out with Animal Crossing, Luigi's Mansion, Paper Mario, and Smash Bros in Early 2012.
There are also a lot of exclusives coming out as well - 2 unique Resident Evil Games...new shinobi, Contra and Ninja Gaiden games, Professor Layton, phoenix wright, kingdom hearts, final fantasy, a new DOA and Tekken, those arcade remake/spinoff games - Pacman/Galaga, Centipede, Frogger.

I don't see lack of exclusive games the problem, not to mention that there is incentive to buy non-exclusive games on the 3DS for the reason of 3D. I would buy the remake of Metal Gear Solid 3 if I was more into buying handheld games these days.