Just a few days before, USB 3.2 was announced to be ready for consumer later this year (2019), along with its confusing name. Today (4 March), USB Implementers Forum (USB-IF) unveils the initial specifications of the upcoming USB4 standard, which is expected to have the same throughput as current Thunderbolt 3 at 40 Gbps.
The new USB4 architecture will be based on Thunderbolt 3 specifications, which Intel has recently made it available to the other companies (Royalty-Free). This allow USB4 to be able to transfer both data and display protocols simultaneously.
USB4 will be backward-compatible with existing USB 3.2, USB 2.0 and Thunderbolt 3 devices, but it will only limit to USB Type-C connectors and cables. USB4 will be utilizing two-lane operation to achieve a maximum bandwidth at 40 Gbps (about 5 GB/s), doubling the 20 Gbps of USB 3.2. It also support the same 100 W of power delivery through USB-C.
USB4 will not be implemented in consumer devices earlier than 2021. Currently, the USB4 specifications are still in draft, which may have little changes and tweaks before the final version is confirmed in late 2019.
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