neowin[.]net/news/forspoken-on-pcie-50-nvme-hints-at-the-true-power-of-microsoft-directstorage-on-windows-11/
Unless you've got Loads of cash to spend on a gaming PC, this is one of those things to keep in mind when you consider hardware upgrades, because sometime in the future it might become a thing -- probably just not anytime soon. You might want to opt for a motherboard with PCIe 5 for example, rather than saving a few bucks settling for PCIe 4.
Direct Storage itself is tech Microsoft brought over from their Xbox that's available in Win10 & 11, though 11 has the edge here. Forspoken is the 1st game to use it, & the game's system requirements are STIFF.
rockpapershotgun[.]com/forspokens-pc-system-requirements-are-still-weird-so-lets-fix-them