Nintendo Life has published a video about how Street Fighter 2 would look in 3D. You need your handheld console to see the effect.
Some classic games that received the 3D treatment on the 3DS are; OutRun, Xevious, Excitebike, Urban Champion, TwinBee, Kirby’s Adventure and Kid Icarus.
No need to imagine, Street Fighter 4 on PC natively supports 3D Vision. And yep it looks awesome!