CAPCOM's internal machine was developed to the PS3/360 and, as such, is heavly dependent of shaders, which are supported by the 3DS. To adapt it to the Wii, they would have to re-write the graphic machine to work with TEVs, which they clearly found not to be worth of the effort.

A Wii version of RE5 should look as good as Conduit or Goldeneye. Personally, that's good enough to me.

Im one of those people that got spoiled by the RE4 Wii controls. I cant play RE5 because of this haha (More like I refuse to play it).

I've heard move controls for RE5 come close to RE4 Wii settings and plays really good.

Too bad the only 2 guys that I know with move only have the free demo that comes with it and nothing else. No RE5, otherwise I would give it a 2nd try.

The Pica200 in the 3DS is still a fixed function pipeline much like the Wii's fixed function TEV.  The difference is the Pica200's fixed function shaders are more akin to Direct3D shaders than the Wii's TEV shaders.

RE5 AI I dare to say that it is even worse than RE4, enemies just run at you and then remain there like there's a field that don't let them pass. Sheva AI is really good I have to agree. Enemy count could be downgraded and games like GTA San Andreas are way bigger than RE5 broad areas.

What I'm implying here is that the game could run on the Wii, with the right adjusments, you may be thinking that I'm talking about a straight port, which I'm not.

RE5 could've been done on the Wii, yeah it would've been downgraded (lack of hd) but it would've looked good all the same. After playing thru DC I'm convinced the game would've looked great. Large environments with plenty of detailed enemies on the screen and interactive environments... it was really just laziness on behalf of capcom. But honestly its no great loss. And heres hoping that with 3ds development comes more games for the Wii since the two are quite similar according to some sources.

Mercenaries 3D already recycles RE5 assets, so you already have a good idea how RE5 on 3DS would look.  In fact, Mercenaries 3D was likely born out of experiments with porting RE5's assets.... perhaps we'll also see a similar multiplayer/competitive focused Lost Planet game for NGP?

I'd also keep in mind that RE5 wasn't exactly the most impressive looking MT Framework title, and actually even already had a "low end" version running for the split screen multiplayer.  A decent conversion could definitely be done for 3DS, the only real issue for Wii was the shaders (HDR especially) and 3DS already circumvents that.

And slightly off topic, but Crytek actually said they were interested in bringing CryEngine to 3DS.  :P

Oh please, the game could've easily been downconverted with some minor concessions (ie: no split-screen, lower res textures, baked HDR lighting, etc).  Look at the models, effects and environments in DSC, they're actually incredibly impressive given the hardware and budget for the game. 

As is, I'd say RE5 is probably the least complex looking MT Framework title, even less so than early efforts Dead Rising or Lost Planet.  It'd have certainly made more sense for a conversion than Dead Rising did.

Which is why I'm suspicious that DR was chose just as an excuse to claim those games can't run on the Wii.

I don't think it was sabotage or any conspiracy, just unfortunate decision making.

Capcom even said after seeing Cavia's work with DSC (with it's high quality models, widespread bump mapping, specular highlights and prebaked HDR), maybe a Wii version of RE5 could've been possible after all.  At that point it was obviously too late though, it's always easy to retroactively say they should've done something but at the time things just worked out differently.