I think everybody's all being a bit harsh. This is truly an innovative product.
All sarcasm aside (yes, I was being sarcastic), I think this product could easily make even the worst signals look... (almost) exactly the same.
Seriously, isn't the entire concept of 4k (and 2k) nothing more than a pointless placebo anyway? I can't imagine any poor fools who would need such a useless gadget in the first place. Of course, I still use DVD's, so perhaps I'm just old-school.