[tcbyrd]

Closest you’ll get is something like a Blackmagic ATEM switcher, using “Program” as the output. Then you can map a software key to swap it out in a single frame. As discussed in another thread, the computer has to be sending the display signal to some device that is seen as a display, and that switcher keeps the video from both PCs buffering at 60 or 30 fps. To the computer it can’t know the display switched and the display can’t handle two simultaneous streams, so you have a device in the middle that bridges that. Down side is depending on the quality of the switcher you might get 1-2 frames of lag because it’s optimizing for frame accurate sync to ensure the least possible “flicker” when the source is switched.

[rsync]

Tangent ... these BlackMagic 2.5" multidocks are so cool:

https://www.blackmagicdesign.com/products/blackmagicmultidoc...

I don't really have a use for one but I wish I did ...