I would float a smaller sofa with its back to the cabinetry so that it looked out the window. It's hard to guess accurately how wide the space is, but the whole set up can move towards the window. A long, single and emphatic axis like this creaetes a feeling of unease and works against a sense of repose. In my opinion, all you want to do in this room is move from one end to the other. There is nothing inviting you to pause and sit.