The composition and geometry is really good but the lighting as you have it now is as unfinished as it can get, it does not do justice to the scene imo. It can look mindblowing with the right polish.
It looks to me like youve spend 99.5 percent of your time on the geometry and texturing and just placed a random light to light it out. Almost like default Max Maya lighting. White, no real believable source, very washed out.
Finish it correctly, and itll kill anything and any one.