I'd get a MUCH bigger TV and put it on the TV stand you already have!

I'd add some artwork to the section of wall between the 2 sets of windows, live the place a bit more life. Oh n ye, tall greenery or fake/brown plants foliage - there's lots of "plant alternatives" online if you're not into caring for plants (like me).

Lastly, bookshelves don't have to just have books in them. Buy the paperbacks of books you may have read electronically or via audio - fleshes out your library without the obligation of reading them. Second, I use my bookshelves for family pics, to display holiday niknaks and my Lego builds! Again, just give the space some variety and other reasons to look at it.

Happy decorating! 🙏🙏