There's also people who prefer getting games on the 360 for whatever. Generally better performance/visuals (though I doubt this will be one of those cases), better online, and even trivial stuff like prefering achievements over trophies. That, and a lot of people are probably angry enough over the PSN fiasco that they'll avoid the PS3 version out of principle. Still, I suspect sales will favor the PS3 version because of all the Demon's Souls fans established there and people like me who are pretty sure the PS3 will have the edge, especially with it being PS3 exclusive in Japan much like FFXIII initially was.