Nobody knows except the people involved with the deal.

The latest is that it will be a publishing deal ala Dead Rising 3.

So whilst it remains possible the game will land on the PC eventually, it is highly unlikely you'll ever be able to play it on PS4.

Well, they said similar. So, the similarity is that the XBox version will be publushed by Microsoft. The rest can be completely different. 

Unless XBox version achieves unbelievable levels of popularity and MS decides to throw more money at SE for continuing exclusivity, there is absolutely no reason anyone should assume that it's not coming to PS4.

It'll go to PC and PS4 6-12 months later.

No, the similarity, expressly stated, is to the Dead Rising deal. Currently, no one expects Dead Rising to end up on PS4.

You have it the wrong way around, there is no reason to assume the game is coming to PS4 - aside from people with no inside information but a heavy bias (eg. poster after you) hoping that it will. Could it? Sure. Is there any evidence whatsoever to indicate it will? No.

Its uncertain at this point, but not very likely to be going to PS. MSFT is publishing it and said its similar to Dead Rising 3 deal which means Xbox First and then about 6 months later it will be coming to PC. PS4 is unconfirmed, maybe, maybe not. Because MSFT is publishing it, it is less likely, but who knows.

the only true xbox exclusive is dishonest PR.

is was explicitly stated dead rising will never come to pc and it did. ms wants you to believe tomb raider will never come to ps4 but it will.

As lying PR. Not a word to be trusted, as MS keeps proving time and time again.

It is similar to Garden Warfare and will go to PS.

But if you're taking DR3 as a basis for your assumption, their correct wording would be "same as DR3 deal", not "similar". And "similar" means that this deal and DR3 deal are different.

How different, we don't know. So, both our assumptions are just that...assumptions. And the possibility of a PS4 port is 50:50.

That's why OP is confused, everyone else is confused, and different people have different expectations. Some are optimistic and some are pessimistic.

And if people with "heavy bias" expect a PS4 version, then those denying that there will be one can also be seen having "heavy bias" for the competition.

Garden Warfare isnt published by MSFT.  It is published by EA

Third Party Games Published by Microsoft that i know of includes  a list that looks like this

Dead Rising 3 - XBO/PC(6 months)
Ryse - XBO/PC(1 year)
Mass Effect (X360/PS3(6 Years)

im sure there is other games published by Microsoft im unaware of though. However those are the ones that i know of off the top of my head