What to do with a half wall fireplace

My husband and I are renovating our house room-by-room. We're now working on the living room. My living room has a 17' wall that is stone halfway up. I just don't know what to do with this space.

There used to be mirror the entire width of this wall. We removed the mirror. I'm thinking of mounting our TV in the middle, above the fireplace. Then what? I'm stuck.
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