There are two reasons I'd care: nostalgia, because Duke 3D was like the second FPS game I ever played, and I played a lot of it back in the day. And two, like Steel said, because of how long it has taken to come out. You can't help but be at least PASSINGLY interested in a game with a history as long as Duke Nukem Forever, even if that fascination doesn't extend beyond WHAT THE FUCK HAS TAKEN THEM SO LONG????? For a game to be in development for over ten years, STILL in development, well.. I can't help but wonder.
WHY SO SERIOUS HAHAHAHHAHAAHAHAHAHAHAHHAHAHAHHAHAHAHAHAHAHAHAHHAA