Bayonetta shouldn't even have been released on PS3. In my understanding, it was made by a pretty small team (Clover) that only had the resources to make it for one system. Has Clover made a PS3 game yet? I don't think they have.
So you can either see Sega and Sony porting the game as a favor to action fans, or as a mistake. But ports are almost never as good when they're made by a separate team. And in this case, they were rushing to get the game ready for a simultaneous release.
There are also games that work better on PS3, though up until this point in the generation most of them are games released after the 360 version. It takes a whole new approach to program for the PS3, so the one-sidedness of the situation so far will probably continue to shift as ways to use the technology become more standard.
