@ Repo: 1080 is good for 4k displays
@ MotoNate: I have a triple monitor setup of three 1080p monitors and it is great for productivity, but I didn't really like it for gaming at all. I don't regret getting the setup because I actually do a lot of work on my computer, but if you only want the wide view for gaming, maybe consider one of those ultra-wide monitors.
The problem with the triple setup is a lack of compatibility for most games, and when you wanna play a game that does work with it, you have to go through a 4-minute process of enabling the feature via graphics drivers.
It is a bit of a pain to use for gaming, to be honest. Not only that, but the peripheral vision becomes distorted so it was actually causing rapid eye fatigue on me, and I was also performing worse in online games such as rocket league.
I really liked my triple setup for multitasking though. I am pretty sure triple monitors are better for multitasking than a single ultra-wide.