RE5 is being developed in Capcom's "Framework", which is a cross-platform engine (for XBOX 360, PS3 and PC). Devil May Cry 4 used this, and the result was a much* better-ported game - the reviews i've read have said that the PC version was exactly like the console, and very nicely optimized.
quote from here
: "I have read, not sure if it's been discussed here, but this engine stuff from Capcom is a major change for Japanese developers. Previously they had built games from scratch each time, shunning the Western practice of engines such as UE3.0. So I just think that aspect is very interesting."