yea well... answer is there isint any. even ps2 emulator is laggy and wont work on all games. ps1 emulator has problems and how old are they?... so nope there aint any ps3 emulators. and i guess after 5-10 years they make one if they get enought powerful and cheap computer parts to run ps3 games.
but hey you can look ps3 store with your computer
... or buy ps3, external usb hd and hack it. (ps3hacks.com)