Note to potential purchasers:
The “4K UHD 3840x2160” display spec is not completely true. ASUS used a RG/BW Pentile display in this model. Pentile is a deceptive trick that lets manufacturers make a cheaper less-sharp display that they can still sell as a particular resolution. The display actually looks worse than the 3K 2880x1620 display in the older UX51vz model.
The only reason Pentile exists is to deceive customers. ASUS is using LITERALLY a worse display, just to be able to sell it as if it were better.