Not a whole lot of details here though, except confirmation that AMD's X570 chipset will be the first to get PCI Express 4.0 support. The X570 may be planned for a Computex 2019 launch.
This X570 chipset would be the first to support PCI Express Gen 4, a technology supported by Zen 2 and 7nm Vega. This is interesting because AMD was not very eager to confirm that consumer parts, such as Ryzen or Radeon RX, would also support PCIe 4.0. If this leak holds true, then it would be very strange if Navi and Ryzen 3000 were not capable of supporting PCIe 4.0 as well.