Finally cracked this puppy open and played some of the campaign. It's funny, but I had the same notion some others had where it all looked so familiar even though everything's got a shiny new coat of paint. It's really the cinematically that are like night and day compared to the original version. They're all fantastic!
It's a little disappointing that the frame rate still seems to hiccup when action gets hectic in close quarters. It could just be the cumulative effect of all sorts of bits and chunks flying making it seem like things stutter. Hard to say.
It's also a bummer that the mouth syncing is still awful outside of cut-scenes (like when they're talking between action segments).
I've played through all of Act 1 (through the berserker fight) and all in all, I'm pretty satisfied. I just wish I hadn't played through it so many times on the 360; nothing is a surprise. The story is burned into my brain. lol.