The USB-IF (USB Implementers Forum) made the format specifications available USB4 which will be launched commercially within the next year. The new standard will have the task of remedying the errors made in the past years during which the 3.0 version has established itself without replacing the previous formats and creating fragmentation.
When it comes to USB specifications, the focus is particularly on performance, an aspect that should be significantly improved thanks to a speed equal to 40 gigabits per second. So let's talk about performance 8 times higher than what is guaranteed by USB 3.0, all without changing the connector format.
At architecture level USB4 is based on the protocol Thunderbolt which was offered by Intel atUSB Promoter Group, this initiative allowed to implement the maximum backward compatibility possible with the USB 3.2, USB 2.0 connectors and, of course, that Thunderbolt 3 that the Santa Clara company decided to integrate into its CPUs.
The goal is therefore to propose a format that can be adopted both on newer devices and on older ones. USB4 was then designed to facilitate expansion operations, allowing for example to take advantage of external GPUs on notebooks precisely because of the considerable transfer speed supported.
It should be noted that the correct wording of the format is precisely "USB4", therefore without a space that separates the name of the technology from the release number. This is due to the fact that the curators of the project did not foresee the development of any update (for example, there will not be a USB4.1) precisely to avoid further market fragmentation.