in the PSvita the sd2vita takes the place of the game cart, yes the vita dose not have an sd , but why fill up your SD card if you can have "switch2sd" type device for your games ie dsiting where game carts go with a loader on it to pick you game etc with all the bells etc coverflow etc , if the game needs to nsiatll anything it just works as normal ie from the game cart slot, leaving the SD card for all youyr other things , i can see my self and i bet a lot of other people are thinking this way , filling up with tons of snes gb sega psx roms which can take a lot of space as well movies and tv shows , hell bobs burgers on the go man how good would that be lol, so i can see a need/use for it just because it already has a SD slot , use that a reasoning not to , me like i said would love to keep the SD card for all roms and if i can run games if swith2sd card type thing why not , 2 me it is a good idea