Microsoft has announced that PUBG is console exclusive to Xbox One.
It would seem, from looking at the marketing material, that this applies to the early access version of the game. However, that is not 100% clear.
It'd be great of Microsoft to confirm if this is a 100% console exclusive, but given all the talk we've heard about the game it seems it may come to PS4 at a later date.
Unfortunately platform holders aren't in the habit of telling people when games will release on a competitor platform.
Right now nobody knows when a PS4 version is coming out. You can however buy the PC version today or the Xbox One version in December.
That's all.