Paint the wall, then add your furniture back into the space with a textured floor rug to cover those shiny tiles. Add warmth and texture in furnishings, and window sheer curtains. The wall has enough going on with that large tv. You could add textured wallpaper or timber floating shelving….wait until the room is back to furnished, then decide if the wall really needs anything.

you do not have enough room either side of tv and fire for any substantial shelving. Maybe just a large tall plant in the corner.

You could also clad wall surround with shiplap, like Hardie groove lining or use stone cladding. Just depends what style your home is.

Is it for heat or for appearance?

Has the wall been built out? It's hard to tell from only one photo showing only one angle of the wall in question and little of the rest of the area.

My first thought was painting it a feature colour would work if all that was on the wall was the tv.

My next thought was what's happening with that window, something looks not quite right?

Paint or clad the wall, but keep it simple and stylish, your furniture will then blend perfectly.

Paint would work and once you have furnishing in place it should look OK, perhaps a tall thin standard lamp in the corner near the window

I was thinking the same @macyjean, it looks as though the wall as been built out with angles on either side, building the angled wall in front of the window.

We crossed over julie, your photo with the potted plant is a good one. The wall has been built out like a chimney

Can you post a photo with tv off. And one with both fireplace and tv on. At moment it is dominating with it being in front of wall and on

Could your TV be recessed into the chimney wall instead mounted on it, using julies last two photos as examples

Basic idea

Consider a black wall and building a timber tiled hearth along whole base of wall

Or this light option might work well

Can you post a floor plan. Just trying to work out how the bump out sits. Looks like some odd angles at ceiling cornice next to window

Thanks for your suggestions..

To answer above questions, the tv wall is built out from existing wall to fit the fireplace.. There are angles at both ends..

Tv cant be recessed in the wall as there are studs behind the wall to hold the tv.

Ok. Consider using textured paint or tiles in wall colour on face of bump out and put a chunk black surround on fireplace to make it appear bigger and the surround Comes out to tv depth. Or almost