Getting a bigger screen allows you to zoom out more
I've been always playing on a casual small pc screen then i upgraded it to a bigger screen and i notice that i can see a bigger portion of the map now.
riot that is not fair. smaller screens should see smaller stuff but shouldnt see less than a bigger screen because that is not fair. you can see stuff coming from far away to dodge them like global ults with a big screen but you cant with a screen that makes you see almost as much as your detection range is. (the range where you remove the fog of war using your champion)