Which is absolutely no different from the base Playstation 4 chip.
It was a PC design with a few extra enhancements like an increase in the ACE's.

The Playstation 4 chip is an AMD design through and through, but with some Sony collaboration on a few of the chips features. - Sony wasn't given some special fab-level/design level access to AMD's chip I.P.

This.
The Xbox One had a few changes over the base Graphics Core Next like support for Xbox 360 texture formats... (Which made backwards compatibility a little easier too!)

It's just Microsoft/Sony taking a base design and semi-customizing it to suit their individual needs.
AMD has multiple GPU teams building designs... And these designs take many many years, Navi likely started development even before the Playstation 4 was on the market.

Not a chance in hell.

AMD has a GPU design in the pipeline that is newer and better than Navi don't forget.

GPU development takes years... AMD loosing a ton of key technicians didn't help matters.
But before that we had the disruption of Fusion... AMD integrated it's GPU teams in with it's CPU teams and eventually reversed that, which means there would have been significant disruption for it's GPU development.

Vega has also been extremely problematic, it's large, expensive and slow, held back by Graphics Core Next's intrinsic limitations... And then we have the fab issue, we were stuck at 14nm for so long.

Pretty much. It's a guessing game. AMD cannot alienate either of it's customers in this aspect or risk loosing a customer.

@DonFerrari
They dont have to brake anything. Its as simple as eating some cost. Lets say everybody asumes sony will bring the ps5 at no more than $500. Ms could just deduce what $500 could bring to the table in a console form. Then they could just build sonething for $600 and then sell it for $500 at a lost. Sony might be doing something similar and eat like $50 loss. Ms dont know that so the jump might be minimal but still enough for them to sell it at the same price. Ms knows that they cant compete with sony so im sure they will sell at a lost the anaconda just so they can have the performance crown. As the real console they plan to mas market is the scarlett. The cheap x1x replacement.

Just speculations on my part. Nothing to do with what was just anounced.

@Permalite
Any chance any of thouse customization could end up being diferent enough to clasify a chip diferently than the base?
Its what i heard in some other vid might be the guy i put in the op. But he said that the ps4 gpu was named navi 9 cuz it was to diferent from the pc variant.

Anyone who calls the PS4 GPU Navi 9 is someone who shouldn't be taken seriously.

Graphics Core Next is a highly modular design, so you can take one library/block/functional unit and alter it significantly to give say... The Shader pipelines new functionality. (Like Rapid Packed Math?) whilst leaving the rest of the design the same. It's still Graphics Core Next at the end of the day though.

I mean, even the Xbox 360 GPU was a significant deviation from Fudo as it adopted some features from Pele like Unified Shaders... But it was still Fudo derived rather than something we can lump in with the Terascale family.

Navi will be Navi. It will be a Polaris replacement... Not a Vega replacement and thus will be a mid-range part.
It will likely adopt a multitude of efficiency gains introduced with Vega and probably a few extra tricks on top of that so it can punch above it's peers in the Graphics Core Next family.

My mistake.I meant ps5 gpu. 

Oh how fun the rumor mill is leading to new gens of consoles, because even when the consoles are announced, then the spec wars begin, down to bus speeds and flops. Just sell me a working console that will deliver a great gaming experience.

They were a year late and $100 more expensive with the purpose just to have the more powerful system this generation. (interview with Phil Spencer confirming 2016 scorpio)

http://www.gamasutra.com/view/news/295830/QA_With_Scorpio_rising_Phil_Spencer_looks_to_the_future_of_Xbox.php

It's not likely they'd spend extra cash in R&D and sacrifice a year of sales for the lolz.

I expect the same mindset next generation. If I had to put money on a company having the more powerful system, it would be MS.

I'm still not convinced either way though. Simply too early to call.

Are you saying they might launch later just to make sure they have best specs and not increase any cost?

That might be fine for a midgen upgrade, but for a new gen launch is just absurd. Sony could claw its way back from giving MS that lead, but theres no way in hell MS could with their lacking first party oferings and poor mindshare outside the US.

I'm pretty sure the "Microsoft is aiming for more power!" rumor has been debunked already. Not that it can't happen, but there's no evidence either way, except Sony being the one who seems willing to bite the $500 bullet so far.

Besides, IBM supplied to MS a processor based on the Sony-co-developed Cell Broadband Engine for the X360 in the past. So it wouldn't be  unprecedented.

If I dint clarify that in the OP then its my mistake. I think is less than a rumor but more assumption. I believe MS cant compete with SONY in any way, so they will bite the money bullet to at least assure more power.