Also after building all this good will, if Sony were to anounce something was runing on a PS4 then we later found out it was a lie and it was actualy running on a PS5 that would do a lot of damage to their public image.

It's a lesson they learned from the PS3 Era. They released a lot of vids targeting what they thought the PS3 was capable of, but most fell short, Motorstorm being the most obvious one, as it looked more like a late gen PS4 game. They got a lot of flack for it and ever since then they have made sure to use in-game or in-engine footage. 

I think you may have misconstrued Digital Foundries statements.
The physical distance from the power source isn't going to make a whole lot of difference in how efficient the power delivery is, there is a difference of course, because the laws of physics does indeed come into play, but it's nothing meaningful when we are talking about consoles.

The efficiency gains comes from how it's integrated.

Nope. Flops are identical regardless if it is nVidia or AMD.
Here is the kicker... AMD's GPU's are optimized for different workloads than nVidia, hence the discrepancy.
If you have a very compute-centric workload, such as Asynchronous Compute, AMD GPU's really start to show what they are capable of and will often beat their nVidia counterparts, which is why during the Cryptocurrency craze AMD's GPU's were highly sought after.

Unfortunately, games are NOT purely reliant on compute and thus flops, games actually do need texturing, geometry and so on you know.

The other take away is... That flops are a theoretical ceiling that is typically unachievable in the real world anyway, hence why it's extremely bad to use it in comparisons... As it's almost as useful as using "bits" to compare a platforms capabilities.

Consoles are cost sensitive devices. 256-bit paths are generally the best price/performance.

And they typically take advantage of higher density chips.

I am thinking the goal is  $400 USD for the initial consoles with more expensive "Premium" consoles coming later.
Sony won big with that $400 USD price point.

The Xbox One X is marketed towards different demographics than the base Xbox One or Playstation 4, which is something to keep in mind.

The Playstation 4 Pro and Xbox One X sold well because they were targeting gamers who wanted something better than the base consoles.
Once those markets have been saturated, you can bet that sales will slow down.

Nope. Navi is still Graphics Core Next with a few new features and enhanced scaling.
Next Gen comes after it.

Which is why I don't believe it will have either 12GB of 24GB. It will likely be 16GB or if they can get a good deal on DRAM... (But still unlikely) 32GB.

It's not just a simple case of increasing the memory bus, there is a ton of caveats to that which I alluded to prior...
And the other factor that needs to be considered is that the next-gen base consoles need to hit low price points, especially with deep discounting later in the platforms life, which a 384-bit memory bus would actually hamper.

I was actually not surprised with what they achieved with GTA 5 on last generation hardware, it certainly looks last-gen with the visuals...

PS3 is an example of going nuts in wrong direction. Better console=longer lifetime etc.

Seems plausible rumour, but still rumour...

Well the competition would still launch something new mid cycle of your "better console" that would be more powerfull than it, leaving you with a machine that was somewhat overpriced troughout its early years that is not the best in the market anymore. The strategy that seens to work best is to release a console that is "powerfull enought" while holding back on the costs as much as possible.

The Last of Us 2 doesn't look way better than God of War and Uncharted 4. God of War still looks more impressive to me as its characters have high polygon counts like the dragon. TLOU 2 does have good animations. It doesn't look like a generational leap over current PS4 exclusives.

Ghost of Tsushima impressed me more with its visuals.

It might be ahead but nothing like a generation ahead. Kratos has 300k polygons in GOW and Ellie doesn't seem to have that much more. The vegetation looks like Uncharted 4 with more density and detail. It looks like they optimised it better than Uncharted 4 but it belongs to the same platform.

Ghost of Tsushima might look better to me because of the art style and depth of field. It looks like CGI. TLOU 2 gameplay doesn't. The TLOU 2 cutscene does look amazing but comparing the gameplay GOT looks better.

It looks fundamentally on the same plane as Uncharted 4. Its not like the leap from Uncharted 3 to 4. Its definitely not far ahead of God of War so I see it as possible on a PS4 Pro. It could be that ND is taking advantage of PS4 Pro more than resolution and that some of these effect wouldn't be on PS4.

Yea i don't expect last of us 2 to look like the E3 trailer, it will be downgraded on ps4/ps4 pro. especially the lighting, like god of war was. PS5 version will hopefully match those graphics.