As long as Sony is making consoles, there will always be some timed-exclusives at the very least. Right now they're bringing "older" games to PC. They're still using new titles to to drive people to buy consoles and enter their ecosystem for now. If Sony really wants to set more records with the PS5 like they say they want to, then I believe this will continue for years to come.

As a side note, I think Horizon 2 is going break some records for Sony.

Exactly. That's no longer the metric of success. 

Instead of cutting prices and aggressively pushing old hardware to reach new heights at the tail end of a gen, the focus will be much more on a faster transition to new hardware and maintaining subscriptions. 

Gamers in their ecosystem, cloud saves, cross generation game offerings and complete hardware BC also allow them to transition into the next generation a lot smoother and a lot faster. So a new generation isn't really a hard reset anymore, it's more of a continuation. 

With that in mind, I don't think we will ever see PS reach the hardware sales of the PS2 again. In fact, looking ahead I believe the PS5 might be the last high (100m+) selling PS hardware unit, as the transition to PlayStation as a service will considerably ramp up in the coming years.

They essentially will follow the same road as MS eventually, but will be slower to move completely to PS as a service, because there is billions still to be made with their existing model.

A PS5 port in 1 - 2 years is extremely optimistic, considering Sony has a large back catalog of PS4 games they can use, & the inconsistent time period before something actually gets ported. So far, they aren't even porting multiple first party games in a single year.

But even if Sony start porting 2 - 3+ titles starting in 2022, they have no reason to port PS5 exclusives until they exhaust their PS4 catalog [a catalog spanning 7 years], unless their console model gets disrupted in the near term. 

Just like you me and every one here I wouldn't have a fucking clue, the whole point was from the beginning based around the question asked of why they would start with UC4 rather than the trilogy remasters.

about the rest it's obvious that this gen has around 7 years to run and the starting and endpoints rarely match, but I can with my fingers crossed (it's a sign of sincerity  here in Tasmania ) promise  you this, Sony won't do day one 1st party on PC or other platforms until their ecosystem is a lot closer to no longer relying  on a console now  whether that's pure streaming or hybrid with supplemental hardware is for fortune-tellers, but then again who knows you may well be right about delayed  releases  it's seems to me that our main difference is, I see more value on the service side needing to be addressed before they move beyond the present policy and the timeline being longer than you do. so let's talk again at the old peoples home. if we can remember that is.

I know its speculation on everyone's part, but I'd bet against this time frame. It is incredibly optimistic.

The game would still be selling millions of copies in it's second year. It seems 2-3 + years is far more likely as the impact of the game on hardware sales would have slowed, with newer big hitting releases taking the spot. The title would also have had a chance to sell the majority of it's front loaded sales by then, and then it can be spun off to the PC for easy cash.

2-3 years would also put a franchise essentially an entry behind at PC level, if Sony's goal of faster development time for sequels develops.