The 3DS has the novelty of 3D. I always wanted to play F-Zero in this form factor and it seemed like a reasonable port to accomplish.
For example, if you play games on a virtual screen using a VR helmet, you pretty much always want the game to use stereoscopic 3D, because playing it without it would be strictly worse. (Okay, it would consume less GPU resources, which is good, but that would be the only difference, and this would also hold for things like lower resolution or frame rate.)