These generally have 11th Gen or 12th Gen Intel Core CPUs, and they're generally fine Ultrabooks with a focus on performance in a thin and light body. More and more laptops are coming to market with Thunderbolt 4 ports included. The takeaway here is that USB4 and Thunderbolt 4 are closely linked, with the latter delivering a more solid foundation for expected performance. You're only guaranteed for one external display with USB4, whereas Thunderbolt 4 offers dual 4K displays at 60Hz as a minimum.
Minimum power through ports is also halved, with 7.5W instead of 15W.
USB4's minimum speed goes as low as 20Gbps (or as high as 40Gbps), whereas Thunderbolt 4's minimum speed is stuck firmly at 40Gbps. USB4 lacks some features and the same minimum requirements that help ensure all Thunderbolt 4 products work essentially at the same performance level. Thunderbolt 4 is not the same as USB4, though the two are compatible with each other. Cables ranging from five meters to 50 meters are also in the works, though likely for a future standard. The best Thunderbolt 4 hubs and docking stations will be able to offer up to three downstream Thunderbolt ports, as well as cables that measure up to two meters. And you'll now be able to pull your PC out of hibernation by using any device connected with a Thunderbolt docking station. Thunderbolt 4 adds extra DMA protection via Virtualization Technology for Directed I/O (VT-d) to help handle connected threats.
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