...Why waste $ on 1080p when 4k is the new standard. Each to their own but lets not promote out dated technology.
Here's from the OP's original post.
"I will use this PC just for trading and watching movies."
You want to be pragmatic and treat the trading like a business, or monkey around in "middle grade" as you call it? It ain't outdated technology. The fact that he/she wants to watch movies on his/her trading machine tells me he/she is not serious about trading for a living.
Again, the question stands...Who the fack needs a 4K monitor for trading. What the fack you looking at in trading that needs resolution so tight you need to see every fucking pixel, and would have to spend a thousand dollars per monitor on it?
Monitors have no bearing on the PC's video drawing speed of the programs running on your PC. You know this, yes? Monitors can take whatever your PC can toss at it in trading. Yes, even the "out-dated technology".