Fortunately I've never lived in any house or apartment that had a fireplace...save one....and above a FP is the last place I'd want to put one....😣
Having a flat screen over a heat source seems idiotic....not to mention the nearly inevitable soot if you use the FP frequently enough....
As a 'fan-person' of architecture for the bulk of my existence, there's rare examples of current home design and detailing that even begins to give a nod to acoustics.
'Open plan' designs do pose a challenge that, for the most part, engender surrender...😒 The 'best' (🤷♂️) I can think of would be an 'alcove' with the 'back wall' non-existent....opening into the open plan general living space....
...that entry/living room/dining/kitchen 'barn'....*L*
Or just giving up....go to a distribution system with drivers every 12', and sensors that 'follow' you around....
The 'immersive option'.... ;) 😏😆