Look at that view!!! So jealous! Organize your decorating thoughts around an area rug. Then, take a color from the rug for the walls and accessories. The niche with shelving also seems to have electrical supply- it may have originally been for a TV. You could possibly fit the TV into it (?) and add some art above the fireplace. The windows are amazing, but sometimes, with light comes heat, especially in Austin. You might consider long panels with good lining eventually, OR window film to cut UV rays. A couple of side table would help with lamp placement.

Looks like the little breakfast area could use a new chandelier that shines light upward - much less harsh on food and faces. A larger table, or one that expands,would be a good choice if you don't have another dining area. I'd place the sofa perpendicular to the FP so the view could be seen. As sooz001 said, fit the TV into the niche, hung on an articulated arm for adjustability. If you're up for a little construction job, I'd open that niche up top and make it at least as high and the top of the bottom window on the right. It looks like it is squashing the top shelf of items.Style those shelves with 1/3 books, 1/3 large decor items and 1/3 open space. How does the pass through with the lamp work? Might put an interesting sculpture there to be seen from both sides. Looks like the lamps may be a good size. Try the end table and one of the lamps at that outlet left of the FP which would be beside the new sofa position. Put the other lamp and a properly sized table with the chair (table within 1" of the chair arm height.) Overall height of table and lamp together should be 58-64" above floor.

Art above the FP should be no wider than the opening of the firebox below. Hi-tech window film plus drapes or top down/bottom up shades might help protect furnishings and floor.

Do you like the nook area next to the fireplace?

I agree it would seem a better choice for your media center. The oval top shape seems out of place but then I noticed it matched your above stationary windows.

If you want to keep the TV over the fireplace you could just close off that nook area to look more balanced? I found with the TV higher it put stress on the neck constantly in the up position instead of straight forward.

Hope it is okay to respond. I was looking for ideas for a nook in my entryway that is driving me nuts. Next to the entry closet. I am thinking barndoors to enclose both areas using the nook for storage instead of "stuff".

Anyways beautiful home and hardwood floors and great view! Like the furniture also.

I would add an area rug. Kilim & some kilim pillows for the sofa. Add a ceramic garden stool for your lamp. If it is possible to use the niche for the TV it would look better Then add some art above the fireplace. A couple of floor vases with some curly willow & some forsythia branches will add some life. You have lamps placed everywhere except where they should be. Check Ikea for some room darkening grommet top drapes. Hang the rods between the upper & the lower windows. They are good quality great prices. Buy wheat color.

I actually love your layout and because the room is small, there is not too many options. I would go with a nice dramatic painting on the wall with colors that go with an area rug that can be placed right in front of your sofa. Have some pillows that bring the same colors to life. Maybe a throw as well. Some ideas:

https://www.houzz.com/photos/family-contemporary-family-room-san-francisco-phvw-vp~34253

https://www.houzz.com/photos/2012-atanta-symphony-show-house-eclectic-home-office-atlanta-phvw-vp~3364508

https://www.houzz.com/photos/home-of-the-year-traditional-dining-room-denver-phvw-vp~396786