Hello there! I'm new but I've read this awesome thread since the beginning!
Vita owner since launch, I had the urge to post today to explain a thing about PS2 Classics you MAY not know (referring to DemoniOtaku post):
EVERY PS2 game can be played on my PS3 slim (CFW) (well, some may have some bugs), the emulator is NOT a different software for EVERY PSStore game (it is built in the firmware) , so in the end, it MAY be developed a PS2 emulator for vita, it's just that they have other things to do at the moment (in my opinion).
PS: no, I've resigned the ps3 PKG but PS2 classics still don't work via remote play (wi-fi is disabled on ps3 during execution and also controllers shuts down at ps2 game start, and needs to be turned on again which is another problem)
PS2: sorry for my bad english!
PS3: you guys rock!