In the end, I think that the legitimate question posted by spurgeonryan has been answered.
Some people didn't like the answers, but I see a common theme to them: games. Not the quantity of them, but the quality.
So, it's not really the price, the graphics or the region locking (although the last one is very important to me).
To give one final, very frank response to the orginal question, what would make me purchase a 3ds is the removal of region locking and the appearance of an ORIGINAL, BEAUTIFUL and INTELLIGENT Metal Gear game directed and produced by Kojima-san. I don't expect anything in the league of Metal Gear Soild 5, but more a follow-up to MGS Peace Walker, with short and difficult missions coupled with strategic intermissions.
Sorry, guys, but, again, not interested in Mario/Pokemon/Batman/Cooking Mama/Monster Hunter/Sponge Bob/Lego/Barbie kind of games. Neither on 3ds nor on any platform.