As the hardware gap between consoles and PC widens so does the degradation of standards in games, this gap was big even 3 years ago but it is pretty damn huge now, we see it all the time with games like Mass Effect, Dragon Age, Crysis 2(which has now worse textures than Crysis 1 because it has been multiplatformed)...etc.

Multiplatforming really degrades the games, so I was wondering how much will Rage suffer because it is not exclusive to PC?

IF i'm saying it as a big IF the PC version has enhanced textures, It won't suffer as much because the only other thing left is high poly models, which seem fine for now. There is enough details on the characters to make it look good. Their physics AI and sound as of now looks good. The only other thing left is networking, which I'm sure will be good as they have enough experience with it due to Quake live.

Now the true problem as you suggest is textures but if the PC version has higher res textures I don't see any issue here. Crysis 2 was blurred to no end with effects but Rage does not seem to be using that strategy so it will be fine.

According to me multi platforming has not degraded games in terms of aesthetics but in terms of programming related bugs. As a specific platform doesn't get enough testing time that specific platform is usually littered with bugs. Rage has been in development for ever and I don't think ID will let a super buggy game out into the field.

But consoles have 5 times less CPU and GPU power and RAM than mid to high PC. That is a humongous difference, obviously if the game will look basically the same on all platforms it will be hugely degraded for PC than it would have otherwise been if it was PC exclusive.

It will be interesting to see how much Witcher 2 will be degraded when it comes to consoles.

because you always have rage to compare with other games? Rage is rage! Id Software! from the creators of fps! And they came to mind something?