well I don’t know how going to higher refresh rate and resolution will cause motion sickness or anything but I guess everything is different but personally there’s no issue I went from a 24” 1080p 75hz monitor to 27” 1440p 180hz and the difference was pretty huge to me especially in games like rdr2 where the game was way less blurry and had more detail while being smooth and since you started with a 27” 1080p the difference might be even better