It is for me. However it wasn't in its default configuration, where it was actually downscaling a 5K display to 4K. When I changed the display settings on the Mac to actually 4K it got a lot clearer.
Not sure why the huge screen is relevant. I definitely sometimes prefer to have what amounts to a large display further away, rather than a small display up close. I don't see why you'd make it bigger than your FOV.