What does that really matter? Almost by definition, a demoscene prod involves clever choices in what to make and display on screen in order to achieve an effect. I'm pretty confident the winners of the competitions for the last few years (a) don't have the same flexibility for artists working with their demo engines as Square-Enix does and (b) would never be able to assemble enough assets and people to do the facial expression stuff with anywhere near the same quality (an area in which, AFAIK, Nvidia has been almost entirely pioneering.) The achievement of this video isn't diminished by the achievements of the scene, nor vice-versa.