Those 2 comparison images above make me sad. I had no idea 2001 was messed with so badly on blu-ray. The blu-ray screenshot looks positively blue when compared with the color-corrected image. I can't believe they did this to 2001. Well, I can believe it. But it makes me sad.
I think the studios are taking the term blu-ray too literally. It doesn't mean the movies need to actually look blue.