I just adore the amount of detail you put into this image. And what a canvas! I usually have to stick to something rather small so that I get the right shapes, but this is just amazing. You took some pretty good advantage of the size too, giving each object depth and distance. Even the lights in the distance seem to twinkle and glow like the stars, as city lights usually do. from afar, it seems as if almost every single detail is swooping in at you. But by getting a closer view of the image, the brush strokes and other lines are more clearly visible, as well as smaller details.
However, that can also take away from an image. When you put a blurr of strokes in to make them look like an object, they can come together well at a distance. But coming closer and seeing these strokes, it really seems to put disappointment in someone's mind to see that the details aren't really quite so clear. Though it doesn't count off much from this image, it does have a slightly sad effect on the outlines of the humanoid figures among the rocks, making them blend in a tad bit too much. It seems almost as if they're part of the background, whereas the actual background pops out more- you don't quite want to pay attention to the character. Because the background is more prominent, it catches your eye more. The hologram seems to have stronger line art than the characters.
I'm a little bit of a hypocrite about that, as at times my backgrounds have less clear line art than my characters, which works against me.
However, I can't deny this is still a stunning view of a city I never knew. It kind of makes me want to climb through the screen and scrablle ont he rocks to see what's below.