If you haven’t herd, Sony is allowing trophies to be earned in old emulated games in a new patent. We don’t know if this could be true. Just look at Apple with tons of patents and most of them don’t even become a reality.
The patent itself shows a flow chart of how it works and triggers the trophies system once hits certain ram memory address, kind of like how RetroAchievements has been doing it for ages.
The recent planned shutdown of PS3, PS Vita and PSP stores announced by Sony, this would not become as a surprise. But how Sony plans to execute this is another problem, given the fact that Sony has a massive library of games to tackle where as RetroAchievements already did most of the work from users around the world .