Not sure why you are taking the hearth all the way across as I think it will emphasize the off-set and limit what you could do with that corner. Keep it the same width as the fireplace. A cabinet that is as deep as the hearth with a piece of art above it or shallow shelving might be options. Or depending on the furniture layout- you may find you need that area to put an end table with lamp on if the sofa runs in front of the windows.

Make an accent wall with color or wallpaper and add planters or a mirror or both or a huge metal wall art.

You can also tile the other side of the wall as well

I have a similar situation. Our fireplace is split field stone so very large and in charge. We have a credenza with flat screen hung above to balance the weight of the fireplace.

Put the t v on the hearth. Add some art.

Would suggest built-in cabinetry with space above that for your television.

Mount the TV on the right side with a low cabinet below it ideally you would not have cintinued the hearth . PPut the TV on an articulating arm and I hope I am understang correctly and the FP and that wall will all be tiles .

Not sure why putting a TV there is being offered since we have no idea of the furniture lay-out.

Probably because MOST people orientate their rooms towards a fireplace and the modern day tension then is what to do with the TV-which most also have and want to see...but you are correct we have been given little information to go on and can only suggest what we have experienced.

And most of those rooms are wider and can accommodate furniture facing the fireplace wall which makes sense but this room doesn't look that wide so why suggest something that may not even come into play by assuming based on "experience" rather than facts.