This impressive work is done by Alex Roman, a 3d artist from Spain. I've never seen something so realistic before, this is the créme de la créme of CG for sure!
Also check out his other solo project "The Third & The Seventh", which is atleast as good as the commercial you saw above. I bet this took thousands of hours to render this all out, but that doesnt match up to the result, wow i'm still amazed!
ps: If you dont believe it, check out his composition breakdown!