A few days ago, the PCI-SIG organization confirmed that the PCIe 6.0 standard version v0.7 has been issued to members. The formulation of the standard is on the right track and will be corrected as scheduled in 2021.
The pin rate of PCIe 6.0 is increased to 64 GT/s, which is 8 times that of PCIe 3.0, and the bandwidth under x16 channels can be as large as 256GB/s. In other words, the current PCIe 3.0 x8 speed can be achieved with only one PCIe 6.0 channel.
As far as v0.7 is concerned, PCIe 6.0 has realized most of the features originally announced, but the power consumption part is still being further improved. The standard has newly introduced the L0p power configuration gear.
In other respects, PCIe 6.0 introduces forward error correction (FEC) mechanism, PAM4 signaling modulation, and more importantly, it also wants to be compatible.
For consumers, perhaps when PCIe 6.0 debuts, we can see an SSD hard drive that is 8 times the current Samsung 970 PRO.
Of course, after the announcement in 2021, PCIe 6.0 will not be commercially available until 2023 or 2024 at the earliest. Just like PCIe 5.0 was approved in 2019, there are no application cases yet.