I play on a 2k monitor, I'd guess that most PC gamers are on 1440p at this point, or at least close to half.
1440p monitors work fine for EQ. I don't take many screen shots, so I don't have many examples I can show you, but here's 1 for reference:
[You must be logged in to view images. Log in or Register.]
This is a 2k UI made for 1440p, if you just use the default EverQuest UI that will work fine too, the icons and everything else is still plenty large enough to see. Just do the tip that others mentioned and use /chatfontsize 5 or 6.