how about a n63 emulator and one where it could also make the games in autostereoscopic 3d?not the best 3d like games specificalyy written for 3ds but, it should be possible to have it do some sort of 3d effect,like those boxes they sell/used to sell for non hd tv's that have active switching glasses and have composite input so that you can put any input plike a dvd player or vcr od game system into it and it will convert it to 3d, also 8 and 16 bit system emulators that do the same thing ,like add the new excitebike like 3d effet to the games,although i havent seen the 3d excitebike yet so im not so sure how good the effect is
another really cool thing i have in mind ,(but it would also involve a slight hardware mod ),would be a 3d facetime like app for the 3ds, but you would need to flip the pcb in the top lid that is a slim rectangular pcb that has the 3 camera components mounted on it,around 180 degrees,they could make some some cheap case replacement that has 3 holes for the cameras to see out of on both the inside and outside of the top of the lid and have some sort of spring loaded mechanisim that would pop the cameras up out of the top of the lid and allow you to spin them 180 degrees and then push them back in ,kinda like the sd slots where you push on the card to make it pop out,or it could just lift out