You might consider interesting wall hung shelving on each side of the tv.

https://www.amazon.com/Industrial-Bookshelf-Improvement-bookshelves-bookcases%EF%BC%882pcs%EF%BC%89/dp/B075NYQYS6

I'd want a larger TV to fill more of the empty space.

I agree with Design Girl. A larger tv would look better.

Looks beautiful! I love the look of chopped stacked wood in the nook. I too agree with a bit larger tv.

Your fireplace needs to look more like a fireplace. Add a big chunky wood mantle just above the horizontal "stripe" of brick. A mantle will tie the wide expanse of brick together. Hang a bigger tv because it is such a wide space. Fill the wood nook with firewood even though you won't burn it. It will give that nook a purpose. Fill the basket with kindling wood and put it beside the firebox. Get some great black fireplace tools and put beside basket of kindling. Add decor to your mantle but make sure it's BIG. Small scale decor will just look like clutter. I'm thinking maybe a pair of BIG lanterns with candles on either side of the tv. Don't worry about the tv being too high. I've had my tv over my fireplace for years and I don't have neck problems.

If you hang the TV there, then you definitely need to do something more with the firebox and wood niche -- right now, the alternating pattern of black rectangles just makes the whole thing look like a quilt. Also remember that if you move your TV to this spot, you'll need to figure out new ways to work all the cable boxes, DVRs, and wiring ...

Thank you for your comments. The larger tv arrived the day after I posted this. We use a streaming service so there is no need of equipment. The lanterns are an interesting idea. I may have to test that out.