Can I ask on what that will translate? Truth is that nobody knows, it can be something great it can be nothing. There will be other bottlenecks in place, otherwise why upgrade the rest when we can only increase ssd speeds?
I think it should be enlightening when you see Cerny literally giving the example of the SSD being so fast you don't need to keep your full scene in RAM, you can literally stream data in based on the camera view and keep assets that are behind you for instance out of RAM. This could mean you use much higher assets because more of your RAM is actually being used directly for what is in view and not as a reserve for what isn't.
Now many games might not be suited to this design approach but that speed can still translate into higher detailed assets at all times in open world games. Maybe a mix between the two whereby your immediate surroundings have higher assets and stuff further out on the horizon in your field of view get higher assets too, with what's behind kept at a lower rate or not at all, and distant stuff streams in as you need it because you can.
Going at half the speed could basically break this impact and massively reduce what you can do. This speed is at such a threshold that new possibilities truly open up. If the TF count was double on one system there would be no doubt about the quantifiable difference that would make.
Developer gossip seems to bare this out, PS5 is doing something truly new and not really seen before and hey, even if it only gets fully utilised to the max by first party devs, are we for some reason
not going to be excited to see what some of the best developers in the world can do when they unleash their talents on this and give us games that are silly not possible right now??? Games like GTAV on PS360 gen wouldn't have been possible without HDDs versus streaming slowly straight off disc. This SSD jump is so huge it's a leap I don't think we've ever seen before, of course it's going to impact game design and what's possible massively.