AMD keeps on working at the supported clock rate of Ryzen. The new generation Ryzen 3000 officially supports DDR4-3200 according to mainboard manufacturers.
MSI talked in a livestream about the leaked pictures of the first X570 motherboards. The fan on top of the chipset is necessary because of a high temperature.
Ryzen 3000 brings PCIe 4.0 to end-customer computers for the first time. Gigabyte updates now indicate that this also works with X470 and B450 motherboards.