I dont get the need for these insanely high resolutions... I sort of get it for work stuff, because you have more room on the desktop but with tiny text? I am wanting more room on my desktop, but I would hate not being able to read the text easily. I was thinking Id love a wider screen, the full width of my desk would do very nicely, but keep it at 1080 highwise
Im guessing for gaming,, well I dont know the benefit for high res for gaming accept making things smaller and sharper.... For me gaming at 1080, it looks fine to me, I would much rather have higher gfx detail than higher resolution. Plus a lower res puts less processing power on your pc, so less upgrading is needed.
There's no problem with tiny text even at 4K when it comes to work stuff, as Windows scaling does a perfectly adequate job of dealing with that. I use a 4K 32" monitor (with 125% scaling) and have never had a single problem reading text. Of course, if someone has sight problems then this may be an extra consideration. Larger 40"+ 4K monitors will have a generous PPI similar to a 1440p monitor though, which at 27" don't require scaling unless eyesight is an issue for the user.
The benefit of higher resolution gaming is, as you say, sharpness. This makes for a graphically far more detailed and impressive experience... but always at the expense of frame rate. Depending on the GPU, this may not be such a big deal (if a high enough frame rate is still achievable), or it could result in a stuttering unplayable mess. In an ideal world, you'd want maximum resolution at maximum detail at maximum frame rate... that surely goes without saying. Certainly, the smoothness of a game is more important than how good it looks, up to a point of course.
I would say aiming for circa 100FPS+ is going to be the ideal for most gamers, so based on whatever GPU they have, they would probably want to be using a monitor resolution that would ensure such FPS levels are consistently hit. That said, it is often game dependent, and some people don't have any issues playing at 60FPS (slower RPG games for example), while others find 120FPS+ essential, especially for fast twitch shooters.
You are fortunate that 1080p gaming works for you. The fact you haven't been spoiled by 1440p or 4K certainly helps in that regard. For me, having not been at 1080p for many years now, I can no longer game on it. On a large TV sat some distance away, I find it acceptable, but just not on a PC monitor less than 1m away.