Great view, but it looks like it was a hazy day. If that's downtown Chicago, good luck finding a day that isn't hazy and humid. Good picture otherwise.
this isn't what I'd traditionally think of as "fill the frame" but I don't think it fails to meet the challenge. However, I think its really missing a strong point of interest. The skyline just isn't popping against your sky..its oclours are nice, but not strong enough to really force the image to fly out at us. :)
Nice Chicago scene. You found some great light. I think this submission could have more impact with just a bit more contrast and slightly more saturation.