A new Thunderbolt 3 chipset has arrived called “Titan Ridge” that supports not only DisplayPort 1.4, but it also provides to vendors the ability to allow peripherals to fall back on USB 3.1 speeds if not connected to a Thunderbolt 3 host.
Source: macinsider

Intel 'Titan Ridge' Thunderbolt 3 chipset allows for 8K displays, better USB-C peripheral connectivity
More from Apple iMac and iPhonesMore posts in Apple iMac and iPhones »
- New iPad Pro in the fall could have Apple Silicon M2 chip, maybe not MagSafe
- Speck Presidio Folio for MagSafe review: Portable charging convenience
- Best deals Jan. 23: $20 Audio-Technica earphones, $12 SanDisk USB-C Flash Drive, more!
- Apple Car engineering manager departs for Meta role
- Fall of 2022 will be Apple's biggest ever, if rumors are correct