I'd just like to plant my flag and note my prediction for the PS5 somewhere. I'm up to date on the rumors, but I'll still go with the following:
-8C/16T Zen2
-14-16 TF Custom Navi
-32 GB GDDR6 RAM
-2 TB SSD
$499.00
I know at this stage those specs just seem too unrealistic, but I think the perfect storm of hardware will come together for this. SSD prices will continue to plummet as we're already seeing. There was that rumor that Sony wants more RAM in the PS5, I think they're going to push for a 4x increase over the PS4. Navi is still a massive unknown, but we've been sitting on this rumor of Sony and AMD partnering heavily for its development. I am not going to believe that all of that money and effort, on a 7nm process no less, will be dumped into producing a GPU just a tad more powerful than the one in the (then) 3 year old Xbox One X. I know Navi TF's might not be comparable to TF's in current gen machines, but still. Cooling and fan noise has been a complaint on PS4/Pro so I think we can say without a doubt that it is one of the priorities they will focus on with the PS5. No clue what cooling solution they'll go with but I think it'll allow them to push for higher clocks.
I know some people want to look at what they've done historically with clock speeds and all, but with the PS4 they pretty much had to just go with whatever AMD had available and make the best of it. With Navi they've had many years to work with AMD, and if the rumors are true about their level of involvement then I think we have to toss the history books out the window. I mean, when was the last time Sony was able to properly control the development of their GPU pretty much from the ground up with many years of lead time? PS4, they had to just go with what AMD had in the APU. PS3 their plans for Cell fell apart and they had to scramble to put something together with Nvidia. I don't know enough about the history of the PS2 or 1 to say how that went. This is their first chance in generations to get exactly what they want. They have the money to pull it off since they're in a far better position financially, they've got the clout with AMD to pull it off with their position as the market leader. I think they're going to take full advantage and build a monster.
Also, I'd guess they'd take upwards of a $100.00 loss on each console to make this a reality. It's also worth keeping in mind that when negotiating with component suppliers that they can not only point to the impressive sales numbers of the PS4 but they will also be ordering a shitload of additional components for the PS Now servers. I'd imagine the increase in order volume should help them to negotiate even better prices.
So yeah... my prediction with reasoning (relatively flimsy as it might be). It's what my gut says and I'll stand by it.