The Xbox 360 is the best when it comes to WRPG, the only platform that can compete with it on that department is the PC. Historically they had an advantage since the original xbox already has TES3: Morrowind as a console exclusive and Bioware made KOTOR and JE for them that were xbox exclusive for a while. ANd not to forget.. Fable.
The 360 for a while had Oblivion as a console exclusive and FO3 is considered to be better on the 360 + it still has DLC that is yet to come out on PS3. Right now they still have Mass Effect 1/2 as console exclusives and Fable 2 as a full exclusive with Fable 3 coming in 2010. WRPG who previously only worked on PC are also making 360 versions simply because they only have the resources to work on 1 extra console. This let to 2-Worlds (console exclusive 360 sequel comming in 2010) and next month we will also see Divinity 2 as a console exclusive and the month after that Risen as a console exclusive. Then there is also the console exclusive spacesim/RPG The Precursors comming to 360. And then I haven't even started with the multiplats like Sacred 2, Dragon Age and Gothic 4. I'm sure I missed some aswell but it's save to say that the WRPG are the reason why I got a 360 and why I have never regretted the purchase.
EDIT: I also like to point out that there is Pirates of the Carribean: Army of the damned, a multiplatform WRPG comming in 2010.
