I like ASUS as much as the next guy

Concerning the $3,500 price tage of the ASUS PQ321Q 31.5-inch 4K display: The price on this is ridiculous! If they can make a 4-inch screen that is 1080p with 3X the PPI on a cell phone for less than $100, they sure as hell can make a 4K screen at 31.5" at 140 PPI cost less than $3,500.

They can, but the demand for 4k monitors is so low that they caen price them however the hell they want, and if you want one, you'll buy it.

Or steal it