What would you think about a little color and a larger area rug?

I would add a rug with a geometric print. Maybe go a little larger.

Add color. Also pull the art arrangement above the sofa down at least 6 inches and pull all of the elements closer together. They should read as a unit

Can you switch the taller round table by the chair with the shorter one by the sofa brining the lamp by the chair to a better height? The suggestion for a larger rug maybe with a pattern and lowering the art above the sofa. It is a lovely room and very nice pieces, but it maybe a bit to lovely. Bring in an older piece of art, pillow or throw that you smile when you see then add things that support that piece you have great taste.

Was your plan to have a monochromatic room? Everything is brown, including all furniture, sofa, tables, rug, drapes and every decor piece, including the fireplace and all mantel decor. Your walls are pastel green which is not shown anywhere else in the room. Are you willing to paint?
Is everything staying or are you open to new furniture?
The arrangement above the sofa is too high.
Have you thought of placing the sofa facing the fireplace and putting the tv on either side of fireplace. Do you just have one other chair, I can't see the whole room?
If you are keeping your furniture and the way it is now, pull it away from the walls a few feet.

You need a much larger rug too :)

Could u give us a few more pics of the room?

Stone fireplace, beige and brown furniture and rug. You need art and an accent color or two (accessories, soft throw, pillows, another rug). And you may need some additional lighting (floor and/or table lamps) or window treatments (as simple as stationary panels).

Are the walls green or gray?

Thank you! I agree, a bigger rug, bring art down over couch, add color, here are pix of the other side of room.

Walls are BM Gray Owl

You have a beautiful home! I agree with the other comments. I think just adding some color will liven the room. Pick one color from the printed chair (peachy rose?... or golden yellow) and carry it to the mantle, the coffee table, throw pillows or throw. A couple of art pieces on either side of the fireplaces would add color and personalization as well.