Because this sort of thing doesn't impress me anymore. It looks pretty much the same as every other demo I've seen for the last several years. Sure, it IS more detailed but those details do pretty much nothing to enhance realism and in fact as the demo shows, the artists go out of their way to show off these features (like 3d movies) and ruin it in the process.
I don't need to be blinded by your overpowering puddle of water, thats not impressive, I don't even need thousands of dollars of GPUs to do that.
Instead of showing me tears that look fake as shit and being proud of it, or a dirty face, why don't you work on things that make the whole scene clearly a rendering instead of reality.
Worse still, you can STILL see that the shadows are not actually calculated real time and not only lag but are jerky in their transitions.
So 10 our of 10 for heating up your GPUs and frying eggs, but 0 for actually impressing me with an advancement in rendering that I can about.