This is fantastic. I'm a Star Wars fan, so of course that lured me in, but your technique is just stunning. There's definitely a lot of realism in the piece, but it's not like another carbon copy type of realism - You can really see the originality behind the piece.
I really love your high contrast shading; not only does it produce very convincing textures, but it really makes this piece stand out even more. I also really like the border you chose; it's very simple and elegant, and complements the drawing very nicely. Keep up the great work!