Intel has demonstrated an early prototype of next-generation Thunderbolt in action, aligned to the USB Implementers Forum's (USB-IF) release of the USB4 v2 specification this week. Next-generation Thunderbolt will deliver 80 gigabits per second (Gbps) of bi-directional bandwidth and enable up to 120 Gbps for the best display experience, providing up to three times the capability of today's technologies to meet the growing needs of content creators and gamers, all while maintaining compatibility with previous versions of Thunderbolt and USB.

"Intel has always been the industry pioneer and leader for wired connectivity solutions, and Thunderbolt is now the mainstream port on mobile PCs and integrated into three generations of Intel mobile CPUs. We're very excited to lead the industry forward with the next generation of Thunderbolt built on the USB4 v2 specification, advanced to this next generation by Intel and other USB Promoter Group members," said Jason Ziller, general manager of the Client Connectivity Division at Intel.

The USB Promoter Group today announced the pending release of the USB4 Version 2.0 specification, a major update to enable up to 80 Gbps of data performance over the USB Type-C cable and connector. The USB Type-C and USB Power Delivery (USB PD) specifications will also be updated to enable this higher level of data performance. All of these specification updates are expected to be published in advance of this year's series of USB DevDays developer events planned for November.

Protocol updates are also being made to enable higher performance USB 3.2, DisplayPort and PCI Express (PCIe) data tunneling to best use the higher available bandwidth. "Once again following USB tradition, this updated USB4 specification doubles data performance to deliver higher levels of functionality to the USB Type-C ecosystem," said Brad Saunders, USB Promoter Group Chairman. "Solutions seeing the most benefit from this speed enhancement include higher-performance displays, storage, and USB-based hubs and docks."

AnandTech, who spoke with the USB Promoter Group at Computex, have shared that the new protocol is expected to manifest in physical, consumer products by the end of 2020. The specification for the next-generation bus is currently on version 0.7, with the USB Promoter Group expecting it to be finalized by this Summer. Then it's just a matter of manufacturers developing new products powered by the latest protocol.

USB 4.0 borrows heavily from Intel's thunderbolt 3 technology - which, if you'll remember, was made available as an open specification very recently. Intel's contribution of the Thunderbolt 3 protocol will enable USB 4.0 to achieve speeds of up to 40 Gbps with multiple data and display protocols being able to share available bandwidth. Additionally, USB 4.0 will make use of USB Type-C's interface, ensuring backwards compatibility not only with it, but also USB 2.0, USB 3.0 and Thunderbolt 3. Due to the many improvements in data transfer speeds and ability to stream multiple data and display protocols, the USB Promoter Group is looking at the possibility of changing USB's trademark logo for the next generation interface, alongside a revised branding scheme.