YES... as soon as PSVita can run PS3 titlesHello, will it support soon the PS3 section with DLC too ?
I suggest have a look for "PSNStuff+" if u like to feed your PS3... I see no need to invite the wheel twice.
And... optional you can use "PSN Liberator" to make your PS3 titles DRM free (so no need for reactPSN or PSNpatch) and/or transform them to ISO.