According to Twitter user TUM_APISAK, Sisoftware has just leaked that upcoming Intel 11th Gen Rocket Lake-S desktop processors will support PCI-Express 4.0 devices, for example, an NVME SSD.
Intel Rocket Lake-S desktop processors is rumored to be announced in late 2020 to early 2021, to compete with upcoming AMD Zen 3 Ryzen 4000X desktop processors. And Intel Alder Lake-S desktop processors will be released in the second half of 2021. Stay tuned for more info.