YouTubes reznoire has shared two videos, showing Gran Turismo HD Concept and Yakuza: Dead Souls running on the PC thanks to the best PS3 emulator, RPCS3. While emulation is not perfect yet, these two titles can be described as a bit playable at this point.
Source: N4G PC Gran Turismo HD Concept and Yakuza: Dead Souls running on the PC thanks to the PS3 emulator, RPCS3