I think the legs may have like some protective caps on them, but yeah it looks a bit floaty. Also the table wouldn't be stable without a support beam in the middle. The rug is crap with those wrinkles making it look like very light cloth and the coffee table is going through it making it look like its 'legs' are bunch of thin sticks digging into the carpet. plus you can see the corner of the skybox in the middle window unless that's some odd refraction, skybox image looks a bit stretched horizontally. floor looks like it's not meant as a floor material but no biggie. actual render quality is good, but people should really stop using huge wall posters for added realism, makes the interior design look cheap.
All in all, I'm not saying the image is bad.