Here's what High Def digest said
"'Enemy of the State' comes to Blu-ray in a very fine 2.35:1 widescreen 1080p/MPEG-2 transfer. It certainly helps that the film was freshly remastered in high-definition for a recent 2006 standard-def DVD release, and I'd rank it as easily one of the best Blu-ray presentations yet from Buena Vista.
The source material is in pristine shape. Grain is just about non-existent. Blacks and contrast are also excellent. Perhaps because it was a Tony Scott film, I expected a totally tweaked image, with blooming whites and whacked-out colors. But while still stylized, the image is relatively natural. Colors are very vivid, but still clean. And despite some use of color filters and harsh lighting, fleshtones remain accurate throughout.
Detail is also terrific. I've often found MPEG-2 encodes to have a harder, more coarse look, but 'Enemy of the State' is one of the smoothest I've seen. Rare is a shot not flush with depth. Shadow delineation impressive, with fine details still visible even in the darkest scenes. I often partly judge a truly great transfer by how realistic skintones look, and here I could see individual pores on Will Smith's face. Noise is also surprisingly minimal, given how rich colors are. Aside from maybe two or three shots where I saw a slight bit of fuzziness in solid patches of color, this transfer is artifact-free. An overall superb effort by Buena Vista.