It's looks a bit washed out because it lacks contrast. This is due to the strong back-lighting. Putting a large white board or similar reflector to the side of the camera to bounce light back in would have helped (flash would be too strong and give nasty highlights).
I also think you might have a few too many bottles and vases in shot - it looks rather crowded. You could have then given a little more foreground under the vases to give a more spacial feel (and the foreground slopes a little giving an intrusive windowledge edge bottom right and cutting off the vase bottom left).
Nice idea, though, and worth going back to.