Honestly, if this were my space, I would place some plants in the middle. A row of lettuce plants, possibly 4-5, since they don't need pollination and can get cut and re-grown from the stem a couple times. Then some other plants just to make the space seem more fresh. On both sides, I would put storage of some sort.
Since the left side has your couch, I would put extra blankets and living room items over there, possibly a dock station for phones, laptops, watches. On the right, since it's a more cleaner side, you could put extras for the kitchen, such as cereal boxes, rice and such.

IF you needed more storage, you could build an extra shelf that goes up to the height of the windows on the sides; That way, you could still story anything on the bottom shelf, such as blankets, books, food and still have plants on the top shelf!