The fact that the cheaper and faster built Sonic for Wii actually took a dump on the sales of the much higher quality and more expensive VF5 for PS3, should show you how publishers will be thinking of developing for PS3. Like all other level-headed posters here have said - it will be very stupid and foolhardy for SE to continue releasing FF13 for PS3 only. A very high budget project, a much smaller base compared to the other 2 consoles, and a chance that sales will tank in NA and EU due to the small base size.