So with Windows 10's "Project to This PC" Miracast stuff, I can use my laptop as a third monitor for my desktop. However, this is laggy, not the highest quality, and requires an active connection. If I had a hard-wired connection between the two systems, the effect would be much better.
My desktop's 1050 Ti has a DisplayPort output, and my laptop has multiple Thunderbolt 3-enabled USB-C ports. Theoretically, I can use this to output video from my desktop to my laptop, then simply transpose the video over my display on the laptop, creating a low-latency connection.
I have no idea if something like this exists (or if anything remotely similar to this has popped up). Anyone have any ideas?