Intel spoke about the integration of Thunderbolt 3 and Wi-Fi 6 Gig+ directly into the 10nm Ice Lake architecture during its presentation at Computex 2019. USB Type-C I/O can now directly interface with the Thunderbolt 3 that is integrated onto the Ice Lake CPU bypassing the need to implement a discrete Titan Ridge controller. Intel is advocating basing USB 4 on Thunderbolt 3 for future devices. Intel also discussed about the advantages of Wi-Fi 6 integration onto the PCH and Intel's own development of the 160 MHz channel for higher throughput and reduced interference.
https://www.notebookcheck.net/Intel-envisions-a-USB-4-standard-based-on-Type-C-talks-about-Thunderbolt-3-and-Wi-Fi-6-integration-in-Ice-Lake-CPUs.422369.0.html