PC has had access to SSD for something like 10 years. I'm sure a lot of PC games are already capable of taking advantage of you having an M.2 drive. But this high speed SSD being in PS5 will pretty much standardize taking advantage of faster SSD for all games on PS5 and PC. So it should be exciting times.

I'm kind of afraid of the HD trying to make up for limited RAM like it did last gen. That tends to make consoles age poorly. If RAM requirements of PC games balloon into 32 GB, the shared VRAM and RAM of PS5 will not be enough. Series X would be even worse off. Then they'd leverage the SSD speed in PS5. But overall that would make both Series X and PS5 age terribly. Unlikely scenario, but just a thought.

One thing about the "PC have SSD for over a decade" that I want to ask, can it load most current gen games in 1 or 2 seconds?

The first SSDs? No. 

Not that.

Because from what I see SSD can cut the loading by 60-80% compared to HDD. But that would make a 1min game taking 10s to load, so PS5 solution would still be a lot faster.

Ok so it handles texture pop in, or in this case near eliminates it. On top of loading times. Good to know, but most gamers will be comparing resolution and FPS like always.

DP 

The only PC game right now that is taking advantage of the SSD somewhat similar to next gen consoles is Star Citizen.

No, I've explained it in two other threads.

The reason why you only see marginal impreovement is the inability of pcs/current consoles to do what the PS5 hardware can do "behind the controller". No pc in the world can achieve this, no matter how fast the ssd is, because the hardware simply isn't there. Detours are required, particularly in pc who simply can't directly stream into gpu memory space. At uncompressed 8-9GBytes/s, loading an entire game/continuing a saved game should take less than 2 seconds on the PS5.

Not really, Cause many people have slow hard drives on their PC, or SATA SSD's (like me) they still have to design basically every PC game around slower hardware.

So games out on PC will either start having SSD Speed requirements, or corners and weird level designs to accomodate slow speed will have to be made. PS5 Exclusives on the other hand, all the chains will be off.

SSD drives are great however I cannot see it making that much difference when it comes to how games are designed. Developers will still go with there own game design choices. Linear style games wont see much difference because they are designed around scene by scene while openworld games can benefit but how much are devs willing to invest and design even bigger worlds? Is there a thing as too big? because sometimes for me, when I play openworld games, being too big can be a chore.

I welcome the faster load times on both consoles and honestly that's all id expect, if they do more with it great but I couldn't care if they do or not. They just need to continue to make great games.