For 3 gens we have had Sony's engineer being able to give better bang for buck against MS and winning the sales race. And I see little indication to have it change. PS4 is smaller than X1, costed less to manufacture and still outperformed it. What credentials would you have to see MS making X2 more powerful for lesser cost than PS5?

Who are talking about launch? Guess you are doing supositions from low information. They are likely to make more than a year contract with volumes defined (reason Switch took so long to solve their supply problem) and with silicon products being in high demand yet then it is much better to secure your production. So PS5 will have higher requests than X2 unless MS decides on blind gamble and risk of consoles on shelves... like X1 that over 6 months after launch still had day one edition available.

I gave you the answer, and you can look at historic to get it. Don't forget Sony is stronger at HW+Game Dev and MS at OS.

A single CCX means 4 core, 8 threads, it's just too little performance and die space saving is maybe 30-40mm2. It's just no point to go so cheap on the CPU. I expect 2 CCX with maybe 2 cores deactive for better yields, but I'm betting 8 cores for Sony as they need it for easy backwards compatibility.

About the Navi gpu and CU improvements, they are based on the latest rumor/leaks. It comes from a chinese dude that leaked the radeon 590 first, adoredtv leaked some navi gpus and wccftech was first to mention navi 12 with 40 CU that has vega 56 performance. It seems Navi will bring decent performance improvement per CU. My CU estimates are not random but based on leaks/rumors (Lockhart = cut-down navi12, PS5 = cut-down Navi10, Anaconda = customized gpu with extra CUs).

It's very easy to make big improvement to GPU cores, take a look at Mali-g72 and Mali-g76 they manage to double the gpu performance per core.

I couldn't say it better :)        

Well. No it doesn't.
A single CCX is 44mm2. - That doesn't include other logic, additional caches, memory controllers and so on.

AMD's 8-core Jaguar by comparison is 24.8mm2.

Zen 2 may also increase CCX core counts to 6 or 8.

And as someone who has a Ryzen 2700u Notebook... A quad core Ryzen is actually pretty capable anyway, certainly beats the crap out of an 8-core Jaguar.
I standby the single CCX comment, because it makes the best price/performance sense... These are consoles remember, not high-end PC's, so we need to keep expectations in check.

At the end of the day... Every mm2 that is dedicated to the CPU, is mm2 that is not dedicated to the GPU. - The component that draws all the pretty pictures, ends up being used for advertising, trailers and showing off a platform.

You don't need 8 cores for backwards compatibility. - I suggest you read up on how threading and scheduling works.

The thing with rumors... Is that they are just that. Rumors. They can be discarded or ignored until something solid comes along.

And just because someone is right about a single prediction, doesn't mean all their prior predictions or future predictions will be correct either... You need to judge each and every claim on an individual basis.

Navi with 40CU being equivalent to Vega 56 is nothing special at the end of the day. - Maybe the performance boost is because AMD finally got Draw Stream Rasterization to actually work? And possibly made Primitive Shaders a proper thing that isn't simply relegated to an API? Either-way, it's AMD playing catch up as nVidia has them soundly beat.

Just don't go expecting a multiples increase in performance when AMD isn't building a new chip from the ground up.
People hyped Polaris... People hyped Vega... People hyped Fury... And at the end of the day, they were all let downs in retrospect.

As for ARM's G76 and G72... There is reason why they managed to achieve what they did. - They made some extremely fundamental changes to the uArch. - Each GPU core is twice as wide so it can do twice as much work. - Graphics are a highly parallel task... So you can either increase your GPU cores width to do twice the work, or double the amount of cores. - End of the day, you potentially achieve the same outcome. (G72 was a 4-wide SIMD, G76 is 8-wide.)

However... AMD's GPU's are already wide cores, rather than ARM's typically narrow cores, so it doesn't make sense for AMD to take a similar approach anyway.

Run games with a similar mechanism as PC. The only difference would be the user doesn't get to decide on the game options. 

Anyone else think they are spreading these rumours and will actually launch holiday 2019?

Never say never, but 2019 seems really too early, mostly for MS who released X1X one year ago.

 PS5 ? well, we still don't know anything official about the specs, and not a single pic of something in development came out, apart from Exclusive cross-gen games, but nothing is official; everything would suggest a 2020 release for both PS5 and Next Xbox.   It's not easy to keep everything under cover and total secret within only 9-10 months from release.