I have 3 right now 54inch mian 4k 25inch 1080p second 3rd is used off and on its a old 20inch 108p panel
I have other rigs with monitors i even got a 1080p panel 27inch on a wall arm stand the one that shoots out hooked up to a second gaming rig for my bedroom.
I figure everyone has these setup's its common to have more than one panel.
Oh and i do plan on going 1440p in my bedroom just still using my old panel i changed out the gpu/platform first.