> USB protocols (and DisplayPort signals) going in and out of devices and computers freely like Ethernet packets, just isn't possible with USB
That reminds me of Intel Thunderbolt Share [1][2], which offers sharing of screen/keyboard/mouse between 2 PCs, and is probably software-emulated ethernet over Thunderbolt.
[1] https://download.intel.com/newsroom/2024/client-computing/th...
[2] https://www.pcworld.com/article/2330173/meet-thunderbolt-sha...