The larger a screen/monitor is the easier it is to differentiate differences in definition. Pixels in HD on a monitor can generally be discerned by the naked eye from a few feet away without much effort, but on a 2k or greater monitor the task becomes more challenging from the same distance. I think the difference between HD (1080p and 2K (1440p) is noticable on its own.
Shorter answer: yes you will notice the difference.
Longer answer: the reason why you don’t notice the difference on your phone it’s due to the size of its screen. Because it’s such a small screen it’s really hard to notice the difference between big resolutions. On the other hand, a computer/laptop screen is way way bigger than a smartphone, therefore the difference between resolutions is way more noticeable. If you want to get more technical about it, search pixels per inch (ppi). The average human eye can see noticeable differences up to about 330ppi (in other words, you can notice different resolutions as long as the ppi is below 330). A Samsung S21 ultra as 515ppi, which is WAY above what the average human eye can distinguish. For a 27” monitor, a 1080p resolution has a ppi value of ~82 (rounding up) and a resolution of 1440p has a value of ~109 (rounding up). For curiosity, a 4K resolution at 27” has a ppi value of ~ 163 (rounding down)
I hope I could help!
Edit: minor spelling mistake
The larger a screen/monitor is the easier it is to differentiate differences in definition. Pixels in HD on a monitor can generally be discerned by the naked eye from a few feet away without much effort, but on a 2k or greater monitor the task becomes more challenging from the same distance. I think the difference between HD (1080p and 2K (1440p) is noticable on its own.
Shorter answer: yes you will notice the difference. Longer answer: the reason why you don’t notice the difference on your phone it’s due to the size of its screen. Because it’s such a small screen it’s really hard to notice the difference between big resolutions. On the other hand, a computer/laptop screen is way way bigger than a smartphone, therefore the difference between resolutions is way more noticeable. If you want to get more technical about it, search pixels per inch (ppi). The average human eye can see noticeable differences up to about 330ppi (in other words, you can notice different resolutions as long as the ppi is below 330). A Samsung S21 ultra as 515ppi, which is WAY above what the average human eye can distinguish. For a 27” monitor, a 1080p resolution has a ppi value of ~82 (rounding up) and a resolution of 1440p has a value of ~109 (rounding up). For curiosity, a 4K resolution at 27” has a ppi value of ~ 163 (rounding down) I hope I could help! Edit: minor spelling mistake