Ayyyyy. You went for a rather dull architectural choice, however you really got me at the light that comes from the window on the right side of the pic. It comes in a straight halo which subtly propagates diffuse light around it in a very beautiful and believable manner. You don't see that everyday with WE screenshots. Nice work, Heinvers! =D
Other than that, the floor gets repeated a lot and the pattern is recognizable to the eye, as Sheephunter mentioned.