Black flooring does not necessarily makes the place smaller. You can play around with the wall colors, mirror, etc, etc, etc......For my case, my whole floor will be confirmed black, then in my living room I will put a white rug, on the white rug, there will be a square wooden black coffee table (perhaps with white drawers but not confirmed yet) or just a modern square black tinted glass coffee table, then @ the edge will have my black fabric sofa. My walls will most probably be white or some other light colors with a black color square clock, black-tinted mirror affixed on the dining area wall....etc, etc, etc.....
Can't wait to have my keys to start the reno going......