Love the double sided fireplace. Grey and white make wonderful companions in a modern open plan space. Add a little texture and pattern, soft lighting and some carefully chosen accessories, then sit back and relax .
This is a nice-looking living room with smaller rug. Perhaps the key is to frame the rug with sofas / sofa and armchair combo / sofa and the window. And another trick is to fill up the room so the size doesn't look awkward.