Looks great. Classic sci fi look is cool. 3d is totally fine. I think for concept environment the piece is great. I think for illustration its good eye path direction around the frame.
Focus seems to be the ceiling and how cool it is because it has the most interest, and the yellow arch is not center in the right column. Right column also doesn't quite match the perspective for its left counterpart.
Otherwise the most right white robbed gentleman is the second focus I am drawn towards and I could wish for something more interesting there to tell a story. But that is final nitpicking, so you could just leave as is. Otherwise great job.
