if it was up to me, i'd make a firmware update that lets the 3DS do patches for DS games.
1. 3DS mode for DS games (basically, letting the DS game romp on 3DS resources), which adds:
2. Access to RAM, shaders, SD card, camera, gyro, pedometer, native circle pad support, EVERYTHING--for DS games.
3. Texture swaps
4. Full expansions
5. Firmware level tunnelling mode for DS/3DS games which have local play but no online play.
6. Suspend feature for DS games.
7. Screen capture feature for Game Notes app (because let's face it, that feature is pretty much forgotten--this should put it to good use). you can choose which screen to export. 3DS top screen will export MPO and JPG; touch screen and DS games export JPG at 1:1 resolution.
8. Better fucking camera algorithms. And Instagram-style filters. because face it, those filters applied properly make shit images look half as bad. And i bet the images are muddy because they are BLOWN UP -- zooming them out should keep images crystal. We don't need 640x480 if they're muddy-- i'll take smaller, 400x240 clear images.