What is an PS3 emulator?

ps3 emulator emulates, copies the function of the ps3 games on your computer, if you have the roms of the game. Till now there are no emulators for ps3, but PS2, there are three of'em, PS2emu, NeutrinoSX2 (not recommended for commercial games) & PCSX2 (highly recommended).

Quote from Wikipedia on PCSX2 "several games have full functionality" not quite what the PS2 does is it. see related link to see how worthless the emulator is when the alternative is buying a PS2 for less than $100. no wonder there is no PS3 emulator