This change has been requested by many who say it will make the game more "hardcore" by removing the ability to use third-person perspective to get a better angle to see around obstacles and the like.
Nobody can doubt the popularity of PlayerUnknown's Battlegrounds, as the PC title's unique Battle Royale structure has captivated millions of gamers all over the world even while in Steam's Early Access program. 1st person servers will be rolling out to EU/NA in Solo and Duo match formats first, with the developers saying that once it is polished a little more the dedicated mode will expand to other regions. Because the camera can be rotated in third-person, this allows players to peek around cover without putting themselves at-risk. The existence of the FOV slider is directly tied to the game's first-person view, prompting many to think ahead to dedicated first-person mode servers.
I can't imagine playing an entire match in first-person, personally.
PlayerUnknown's Battlegrounds hit the ground running when it was released back in March, with updates big and small coming at a steady pace since.
In case you are confused, PlayerUnknown's Battlegrounds will offer dedicated servers in which players will be gaming in first-person mode.