Wow this looks amazing! If this were a book cover, i'd definitely read the book lol. And your futuristic buildings look great!! Shiny, smooth and lots of windows - definitely right on target. I also like the grooves in the building on the right.
That's kind of what I have in mind when I draw, but my main reason for going into all this is to bring out my imagination onto paper that would otherwise be lost after leaving this realm we call the real world.
Your sig, 'Let the Heart Draw' pretty much is the truth of what it means to draw. Keep at it, you know how to let your imagination run wild and express it.