The technical details are all right (or seem right to me, anyway), but this is too opinionated for my liking. No, you do not need a 4K monitor for software development. Some people might like them, some won't. [edit/clarification: someone rightfully pointed out that nobody will actively dislike a 4K monitor. I was unclear here: I meant "some people won't need them" more than "dislike them"] This sounds like when Jeff…
I'm primarily a C programmer. 1366x768 limits my functions to about 35 lines at 100 columns wide. My font is Terminus, sized at 14.
I thank my x230 for enforcing me into a paradigm where functions are short and to the point. I watch my co-workers flip their monitors vertically and write code that goes on for days. While it's not my style, I'm thankful I've been forced to make do of limited space, and it has trained me well.