I currently run a 34" 3440x1440 curve, and ever since moving to it i couldnt use anything else. a 2nd one would be even better for gaming on one and browsing on the other. 3 would really only be beneficial for desktop application/usage.
Ultrawide is the way to go. You get the multi monitor feel without the pain from it. multimonitors the fov just turns to shit. i had 3 28" monitors before, and never again. Very cool in theory, in the end it just doesnt feel right.
Secondly for a single 27" imo everythings to small, theres not enough space. The second text appears, kiss it goodnight. It may be ok for some, but being legally blind in one eye makes it a very tough choice for me ontop of this, adding more 27" monitors with rediculous resolution to get more area isnt going to work in gaming scenarios at 4k. Trying running any demanding game at 4k across 3 monitors… pc is going to halt and ask where the horse power is.
Personally i think 1440 is the wave of the future. I’m currently waiting on a 1440 34" 144hz g-sync monitor. When we see monitors that can support this, and connections that can support this, i’m investing!