Oooh, I like how you're faking the hanging lamps. Didn't even realize they were just little hovering circles until I looked a bit closer. Just a few nit-picks:
- That fence texture around the red-colored vent seems to be a bit overscaled. I think something more around the size of chain-link might work better.
- Window texture in 2nd shot looks way too over-scaled compared to the other windows.
- Ceiling seems kind of boring, but I suppose you don't want people to focus on the ceiling in the first place. I still recommend having wires or chains or something hanging down though.