Why are acting like this is new have you been living under a rock? We have known about direct storage API for PC since near the beginning of this year. Unless you have fixed function hardware or some sort of hardware on the GPU like ampere does the direct storage API is doing nothing for you. It's a software that's allows the system OS to bypass the CPU for decompression in layman's terms if you have the hardware for it. It not magic it's not what's achieving the numbers it's just this piece of hardware can communicate with this other piece of hardware more directly.They're probably using the tensor cores to decompress the assets. Either way, DIRECT Storage API is the method of delivery. Everyone can try to downplay it but any I/O delivery on Windows is because of DX12U and the innovation MS brings to it's OS.
Software cannot make up for hardware.