In case you’ve never seen it CoolVibe is indeed a cool site for genre fiction fans. From their about page:
Coolvibe is a site dedicated to showcasing the best and most inspirational digital art from around the web — be it science fiction, fantasy, retro, 3D, illustrations, vector art, and virtually everything else.
Case in point is this wicked cool Steampunk Iron Man by Mateusz Ozminski, an artist from Poland. The range of styles on CoolVibe is wide and eclectic so you’re sure to find something there that you’ll like. Check ’em out.