Let's add some floor to ceiling drapery to those windows! I would suggest going with a light neutral and bold dark, hardware. This way it will accentuate the height of your room, and pull your eye UP! The art above the bed is just fine and dandy. With the perspective it does pull you into the room.

I personally would hang either one large photo or two photos above the bed (2/3 the width of the bed frame). I would also hang curtains on either side of the window to make it more cozy. I bought a big fluffy white comforter for our bed because it reminded me of a sheek hotel. Then it’s easy to add pillows or a throw blanket to add color and/or textures. I would turn that corner with the chair into a cozy little corner. Maybe add a floor lamp to hang over the chair and add a tiny little table next to it to set your coffee or book. Its hard to tell what color/style your dressers are but I would get your nightstands in different colors than the dressers so it’s not so matchy. Maybe mirrored, navy or a dark gray nightstands.

I like the room and the piece of art over the dresser. Could it be lowered a little bit? Perhaps a basket or something a little larger could be put at the other end of the dresser. I'd leave the rest of the wall blank.

I see a tiny corner of a small pink (?) rug between the bed and the seating area? I think you need a beautiful VERY LARGE tonal Persian style rug for this room. Your room is monochromatic and you can keep it that way, but you need something to soften the floor. Soft colors. Art, too, that reinforces the colors that you have going on. Love the draperies! Perhaps lean in to that color as you accent for a side chair, a pillow or two, etc.