Cripple nintendo? No, it wouldn't cripple them, it certainly would eat into their profits, because there is a lot of people who will play a lot more DS games through emulator that they wouldn't buy. (Most people have larger rom collections for GBA than they own games, at least in my experience.)
As far as using a graphics tablet, I think that would work fine, perhaps not if you have a cheap tablet, but with higher end models you could even regulate a portion of the tablet to be the ds lower screen, you wouldn't have to worry about going off the edge. Though most of my favorite games use the stylus in a way that's less than invasive (Castlevania, Advance Wars, etc) so it all depends as well.
Course there will always be problems, but generally speaking an emulator would eat some of their sales, but it wouldn't cripple the company. It's like comic books, most all DC/Marvel comic books you can download off the net, but both companies are way up statistically in sales, and while some people will say they actually care to have a comic book in there hands, most don't, and it can be an expensive hobby, and you'll find in life that people will settle (even for using a tablet with an emulator) if it saves them an arm and a leg. (I mean, otherwise people wouldn't be using Flashcarts.)
As far as using a graphics tablet, I think that would work fine, perhaps not if you have a cheap tablet, but with higher end models you could even regulate a portion of the tablet to be the ds lower screen, you wouldn't have to worry about going off the edge. Though most of my favorite games use the stylus in a way that's less than invasive (Castlevania, Advance Wars, etc) so it all depends as well.
Course there will always be problems, but generally speaking an emulator would eat some of their sales, but it wouldn't cripple the company. It's like comic books, most all DC/Marvel comic books you can download off the net, but both companies are way up statistically in sales, and while some people will say they actually care to have a comic book in there hands, most don't, and it can be an expensive hobby, and you'll find in life that people will settle (even for using a tablet with an emulator) if it saves them an arm and a leg. (I mean, otherwise people wouldn't be using Flashcarts.)