jRPGs sales in the U.S. are nearly as high as japanese ones and sometimes surpass them. The 360 has a higher userbase than the ps3, japanese companies start caring more about the worldwide market than the japanese one. M$ is trying whereas $ony is not. It´s pretty clear why most HD jRPGs end up to the x360 instead of ps3.
The best thing would be that all HD jRPGs go multiplatform. I think SE will do this, I would assume they are having technical difficulties into bringing their games on the PS3. Namco Bandai should also be doing this. They will definitely be winning by going multiplatform.