Intel demonstrated a Tiger Lake system on stage in their CES 2020 keynote yesterday. One of the interesting aspects was the teaser of Thunderbolt 4, with a mention of it offering four times the speed of USB 3. After reaching out to Intel for additional details, it appears that they are not ready yet to share additional details.
Intel did confirm that that they were referencing USB 3.2 Gen 2 – the 10 Gbps version – in the keynote presentation. This means that the peak speeds (40 Gbps) are not changing relative to Thunderbolt 3. Given that the Thunderbolt 3 specifications have been donated to USB-IF for USB 4.0, it appears likely that Thunderbolt 4 may be a push for Intel certification of certain Type-C ports. We look forward to receiving more concrete information from Intel regarding the new features, if any, in Thunderbolt 4.