Ssd does not render graphics. Exact same demo could be done on pc with a standard hdd. It would just need adequate ram.
True and yet think about what this would mean.
Taking into account that both next gen consoles have 16GB of Ram and open world games are going to have at least 100GB of Content.
Lets assume you have enough Ram to load in the whole game:
For a hdd to load all neccessary data you would need 100GB / 50MB = 34 Minutes of loading time.
For a ssd to load all neccessary data you would need 100GB / 500MB = 3,4 Minutes of loading time.
For a low end nvme to load all neccessary data you would need 100GB / 2400MB = 42,67 seconds of loading time.
For a high end nvme to load all neccessary data you would need 100GB / 7000MB = 14,63 seconds of loading time.
However this is only taking into consideration the filesizes. Without thinking about compressed vs. uncompressed data.
Now either you invest CPU/GPU cycles for decompression on pc or you could use the decompressed data right from disk but having to spend about double the size of your harddrive.
So yeah pc's will eventually be able to run this, however not by the time these consoles arrive.
The flying part of the demo was a cutscene, hmm.
Yeah I guessed that by looking at the demo. No way someone was actually piloting the char in realtime during that flight scene.
I just hope that only the path was fixed and nothing was precalculated. Otherwise the Demo really was over exaggerating the U5 Engines and PS5's capabilities.