Reclaiming Old Details

I haven't done a great job of highlighting the details of my 1890 rowhouse (most of them were erased by previous renovations), but someday I'd like to open up the old coal fireplaces which have all been covered up and drywalled over.

Something like this:

But would it be too weird to put a flat-screen TV above it? I kinda like mixing old and new, but I could also see the look being a little jarring...