This may not be what you're looking to hear, but honestly - that wall has so much height going on, I think it screams out for a beautiful wall unit. Something that would house the tv/electronics in the center, with bookshelves on each end.

Do stairs rise behind the open slant? What does the ceiling line look like? also, do you have a pic showing the left wall and windows? The light and shadows on your tv wall are so beautiful! Such a lovely soft color.

There is a loft above right side of tv. I know a wall unit would be best for this wall, but not possible at this time. I have some metal fleur-de-lis, different sizes, maybe those with something else too?

So to the left of the loft, it continues to soar? Love the two loft angles! I've always wanted plants, like on top of your tall cabinet, spilling down gracefully from such a loft. All your plants are lovely.
Is the arched window to the left of the tv the tallest window on that wall?

What do you think of something like this? meg711 posted this in Fabulous Wallpaper ..... I instantly could see it in your soaring space.
http://www.victorialarsen.com/Plaster%20Stencils/Right%20Aspen%20Tree%20Daytime%20small.jpg

Lovely room. I also agree a large wall unit would work best to take up all that space.

Are those return air vents on the wall?

Can you post some more pictures to show the entire room an different angles?

I think the tree stencil, if done in the thick medium, would look lovely.

I'd use a large textile wall hanging - a rug or tapestry, or even an art quilt - since large/high spaces like that usually need a bit of softening way up there. Even if/when you got a large wall unit for your tv and stuff you'd still have quite a bit of empty wall left above it. The iron thingies could go on the half-wall on the right that looks like it's the upstairs hallway.

(Paint the HVAC grilles to match the walls, too, but you know that already.)

I have the exact same table lamp as you do on the sideboard by the armoire - mine came in a set with two floor lamps about a squintillion years ago. :-)