@mrstickball:
If history repeats itself, most of the RPGs this generation will come from where they are popular -- namely Japan. In Japan, the Wii is King, and the PS3 is a distant second. The X360 is barely on the radar there (despite MS'es valiant attempts at capturing the Japanese audience via generating demand for exclusive 360 RPGs), and as a general rule, Japanese retail doesn't like to sell American products if they can help it, especially when there is decent competing Japanese hardware available -- thus my conclusion.
The X360 fails in Japan due to anti-american bias on the part of the retailers (read: old-school Japan), not its lineup -- sorry but its true, and it will remain so for a long time to come. Microsoft cannot buy the Japanese consumer into their fold. They can push, but I don't think its within their grasp for a long time to come. RPGs are popular in Japan, and many parts of Asia. They kinda flop in the west, as a general rule, with notable, violent, FPS/TPS-similar exceptions (WRPGs), of course.
RPGs, as a genre, are a terrible reason to not purchase a PS3... eventually. Right now, the 360 has the lion's share, but that's destined to change. Its inevitable that most JRPGs will end up on the Wii, and the least will be on the 360 by end-of-gen (through no fault of MS's effort, I might add -- they are bold with getting X360 RPGs, and I respect that). Japanese publishers like to be well-regarded and well-known in Japan, as well as rich. Sorry.
EDIT: I am making a big assumption here, that most console RPG fans consider JRPGs as a staple. PC RPG fans have enjoyed WRPGs for years, of course, so if you're coming from that environment, and JRPGs don't interest you, the 360 is a fine console (W)RPG platform choice, as you stated.
