Hi @Firemaker , I have found some better setups or ideas so I'm not using the video capture card approach right now.
I tried the video capture card approach sometime back with my Apple M1 MacBook work laptop streaming into my good windows personal laptop setup through video capture card with OBS. I found that this reduced my symptoms and manage my work. Please note that it was not complete relief. I used very basic video capture card. I agree that screen was bad. It only support 30 fps so latency will be there. But my work involved only coding, web browsing , zoom calls. No video or display depending work. Initially I struggled to adjust to low latency. But after few hours, I have got used to it. So the latency was not a big problem for coding and browsing.
I'm from India. I used this $10 card.https://amzn.eu/d/j5aMsgD
My suggestion - use very basic card and check how you feel. Just check the eye strain part. Don't worry about the latency or screen quality.
If there are no eye strain, you should start using it and few hours of usage, you will start adapting to latency and screen quality issues. If you feel the strain at the beginning itself, try different OBS studio settings and check.
My experience is that don't spend too much money because any setup works initially might end up not working later because of some os updates. Every person is different. Setup works for a person might not work for others. So try different approaches for yourself but with minimum costs. Once you find a working setup, stick to it and don't modify anything on hardware, software level.