Still with limitations like 1080p60 and licensed client apps being required, I don't see this as being all that exciting compared to the variety of existing software KVM software already available. It really feels to me like they have the bandwidth to do better than that?
For reference, DisplayLink DL-5xxx has been doing 4k over USB since 2014. https://en.wikipedia.org/wiki/DisplayLink#DL-5xxx_(2014)
Linux has had the pieces around for a while. Usb-device-mide gadgets in Linux can be connected to a usb-ip virtual port, so you can share virtual peripherals. The rest is regular networking. Wild but USB gadget mode has been around here and there in laptops for a long long time now, but has rarely ever been used. Here's a steamdeck acting as USB printer, https://hackaday.com/2023/01/31/steamdeck-become-printer/
Getting an add-in card that can do usb-device-mode / usb-client mode can be tricky but is possible. This capability seems standard on most single-board-computers like RPi (since rpi1 iirc?). https://github.com/ufrisk/pcileech/issues/21
There is support in gstreamer. The example shows piping the standard test signal out as uvc gadget. https://gstreamer.freedesktop.org/documentation/uvcgadget/in...
There's various write-ups out there for example using a RPi as a USB webcam, using this. These write-ups cover more of the details of - as an end user - setting up/configuring the gadget device. https://github.com/geerlingguy/pi-webcam?tab=readme-ov-file#...
So I bought a couple 2.5G USB 3 adapters and confirmed: iperf3 reports 2.5 gigabit between my laptop and desktop connected to the same switch.
Much cheaper than getting a new NIC for the desktop.
gigabit Ethernet over a switch under my desk makes nomachine almost pleasant.
If you mean RJ45 built into the device then I don't see how that's implied by the above comments.