I mean... You contradicted yourself a fair bit there.
I did clarify that in mu opinion (IMO) the 1440p/144Hz+ is a better gaming experience, that's just my opinion and resolution, PPI, Refresh rate are all subjective.
In my own experience the jump from a 24" 1080p monitor to a 27" 1440p was very noticeable and provided a considerably better looking gaming experience (again, just what I've found personally).
The jump from 60Hz to 144Hz was massive, the biggest jump a gamer can find in a monitor (IMO). However, when I tried a 240Hz monitor (the G7) there wasn't as much of a difference. Again, this is only to me.
The screen size increase from 24" to 27" doesn't even come close to levelling out the increase of resolution from 1080p to 1440p. You claim of only 24% increase makes no sense where the GPU is driving 77% more pixels.
You've also completely ignored one of the most important aspects: warranty. Another reason I recommend Dell.
At the end of the day, each to their own. I personally won't drop down to 1080p anymore and will eventually move to 4K when GPUs can reliably do 4K/144Hz+.