Not sure I explained myself well, based on your response. I am notsuggesting wrapping the brick wall in wood, and the wood i am suggesting would match your cabinets. I am suggesting a panel of cherry that runs in a vertical line the width of the fireplace (after covering the brick surround and one brick width wider all around that in a dark granite). The rest of the wall would remain brick. The wood panel would cover the arched niche (once you knocked off the lip). You could easily add a mantel then, perhaps in the same wood or even a rectangular box of stainless steel) on top of the wood panel. The ledge may be at eye level,but that in now way precludes you from leaning a piece of art on it. Check out how art is hung in galleries and in collections in homes, and not all of is (or can be if in a grouping)at eye level. I wish I could photoshop this to better illustrate my thoughts.

I would not add blue to this room. The orange looks great, and suits the woodwork very well. The wall looks, to me, like it has some olive green tones in it. Green is the complementary color to orange, so that's why the walls and sofa look good, and go well with the rug which has both those colors. Blue would be jarring. The rug is a bit too small since the furniture does not touch it. I would face the sofa towards the fireplace with the rug in front of the sofa, with the sofa feet touching the rug. The gold chairs could go on either side of the sofa in a C shape, or remain side by side in an L shape conversation area. I'd put the orange pillows back on the sofa, and get new pillows for the gold chairs, in a solid green color taken from the rug. Consider a similar color for the drapes. I wouldn't put art over the fireplace, and definitely not a mirror since it wouldn't reflect anything interesting. Stick with sculptural items, maybe a bit bigger than the items you have now. Hang a piece of art work over each of those lovely bookshelves, a little lower than you currently have the one painting. Or even prop it on top. But don't put other things (vase, clock) on top of them. Too fussy and distracts from the woodwork. 2 desks is one too many in the room. Keep a desk on the wall where the guitar is, and leave the other wall free of furniture, as a walkway. Your white front door is a bit too bright, and doesn't look good with your woodwork. Paint it a green color, not too pale, that looks good with your pillows, rug and wall.

It looks worse after you lowered it. Why do you even need the tv stand? I have mine hung on the wall with nothing under it and it makes the LR feel so much roomier. If you need a BluRay player or game or something,, you can get one of those little shelves that are made for that and go under the tv very low key. I disagree with a bunch of pictures and plants or anything else surrounding the tv. It distracts from what you are trying to watch.

Nice room! I'd leave the walls on either side of the window empty; every space needs room to breathe. And it may just be me but I'd avoid any art that is made to "match". On the wall above the couch, a large horizontal piece of art you love would work, Or try a long narrow picture ledge with a nicely curated collection of your favorite photos and art. There are lots of inspiration photos of finished picture ledges here on HOUZZ. Love your choices so far. Good luck!