I would love more remasters if they are for good games like TLOU, GOW III and UC. However I don't think Sony has any other franchises of this calibur, maybe a GOW I and II remake or Ico/SOTC HD port will be good. MotorStorm Collection and Wipeout Collection will be welcome too.
They have Demon's souls and also Infamous trilogy-ish which is one of my fav exclusives on PS3. But I fear a Infamous collection remasterd would be a lot of work because of the open-world assets.
The problem with Ico / SOTC in my mind is that those are PS2 games with PS2 assets.