Hard to find a solid answer about this. Reading this & this you kinda get the idea RTX IO, MS Direct Storage and a 3500 mb/r SSD would do it… but there’s no real confirmation though …
On the demo’s they specifically state it’s running on a PS5 / Series X, and their party piece is that super fast SSD ( comparable to a PCI gen 4 SSD on the PC )
Am about to pony for a laptop, that doesn’t have PCI gen 4 though … if it can’t do Nanite, I’ll need to look for a different model…