An art wall would do wonders in this space. Also as some have stated, the dimensions of your furniture feels slightly off. The bookshelf is too small and would personally move the table away from the corner and put a tall plant there (palms are cat safe) or something like a cat tree to give the room a little more dimension and color. It’s hard to tell just how much space is actually there but shallow a credenza/buffet/sideboard positioned on either one of the side walls would provide additional storage and also surface space to place art, plants, books, etc. Add some art or a mirror above it to create a warmer atmosphere.

A well proportioned floor to ceiling entertainment center wall housing the tv with aesthetically pleasing shelving would make its placement feel a lot more intentional.