Yeah, I wondered the same thing. I have a feeling they may have applied some oil to them, or something, just for the photos. Wetting (or oiling) helps bring out the color better.
Mine has a very slight sheen to it, but just the normal sheen you'd find on good quality glove leather. Same as the Amazon covers (the non-pebbled ones).
Unfortunately, the lid doesn't have a magnetic closure like the official ones do. It closes exactly like the official K4 and KT covers did. Just flops closed like a hardcover book would. I never have a problem with it flipping open though. I just make sure, when I put it in my purse, to put it open side down. Open side up would probably make it flop open.