Intel has announced Thunderbolt Share technology that leverages the bandwidth provided by Thunderbolt4 and 5 ports to share and sync data and control 1 PC with 2 keyboards and mice. 

Not the first way to link 2 Pcs. I've been using a crossover cable in the past few years, and I recall using a USB-linked device about a decade ago, but this method seems to be the easiest way yet to link two PCs together. It is not quite a plug-and-play solution, however, as it will require a software app to work.

The most basic Thunderbolt Share is a great way to share data between 2 computers, eliminating the need to transfer data using a flash drive or an external hard drive. It supports drag-and-drop function, and automatic folder synchronization. I really like the idea of using this to transfer steam backups between benchmarking systems!

Besides data sharing, Thunderbolt Share supports remote access, so you can use 1 monitor, keyboard, and mouse to control your 2nd PC. It supports screen sharing at up to 60p at 1080fps. Support for 1440p or 4K would be nice, but that's something that could come in the future.

Thunderbolt Share can be licensed with Thunderbolt accessories. The dock is the most logical example, but something like a monitor with multiple Thunderbolt ports can also use it. AMD owners seem to be out of luck, at least for now, because it's Intel's technology and separate from USB4.

Intel has emphasized the security aspect of Thunderbolt Share. It supports VT-d and Windows user access control. Also, sharing data over a cable is inherently safer than using WiFi, a wide area network, or the cloud. 

I have never used a Thunderbolt device on my home system, except for a few tests with an external Gpu in the past few years. I like how this sounds very much, and this may be the first time I consider using Thunderbolt on a daily basis. We need to wait and see how the app actually works, and then give a thumbs up.

Intel says Thunderbolt Share will be available on some PCs and accessories starting in late 2024. It comes with Lenovo, Acer, MSI, Razer, Kensington, Belkin, Promise, Plugable and OWC, and many more announcements are expected in the future.