When I had a 17.4" 1080p screen laptop, I genuinely thought that was all I wanted in a monitor. I saw no possible reason, and had no desire to get a bigger monitor.
Then a few years ago I needed a better monitor for a PC. I had read about people saying bigger is better, and also higher dot pitch is better. Anyway I could not even find a 17.4" monitor anywhere, as they did not make them. Eventually I bought a 1080p 22", (which is actually 21.5"). ...... Immediately I loved it. Even though I had argued with myself for thinking I did not want or need anything bigger. It was way beyond better, than 17.4".
Then recently I decided I needed a bigger monitor for content creation. It would help in gaming to be bigger. However I knew that the higher resolution would be harder work for my graphics card to push. ... Eventually I bought a 27". .. Initially I thought it looked stupid. Even before I built it, I thought, "It's ridiculously big, what have I done".... It looked ludicrously big on my desk.
Then after about a week I was adjusting to 27". By two weeks I loved it. The higher quality panel in it, makes images better, than over my average-good 22". The size makes things easier to see. ........ In games it's almost like being in them, because stuff like buildings look so big. I have to look up to see stuff that is higher up on the screen, which adds to immersion. Rather than viewing a picture and moving it about, at 22". ... I find myself opening my eyes wider and relaxing them while gaming at 27", rather than squinting to see what's happening at 22".
I honestly did not know what I was missing. I actually prefer gaming more now than before, to the point where I would rate games higher in reviews. Like Doom 2016 on 22" rate: 8/10. On 27", 10/10. .. Lastly having two windows open in 27" side by side is easier, because there is more room.
Anyway, the moral of the story is, if you buy wrong, you could buy twice. Or later you could well wish you bought different. To me now, 27" just feels totally normal. I could not imagine using anything smaller. It just feels natural. ....... Although I would not knock 22" at 1080p, and say that is the absolute screaming bare minimum anyone should need.
The downside is that games need huge GPU power to run maxed out in 1440p at 27". Although some gamers say they prefer having a larger screen and lower settings. Rather than larger screen and higher settings and slow frame rates, or smaller screen.
It's up to you, but that's the whole story. Most people I have seen write about this, say the same.