techsupport

My use case: I have an M3 MacBook, but a much more flexible and powerful gaming PC that I'd like to hook up to my MacBook to act as a display receiver with zero/low latency. I make use of the MacOS virtual desktops and would ideally want to be able to fullscreen an app that just sits there and will display the input when I turn on my PC.

Same thing under Linux: I'd like to connect a console to the gaming PC which then displays on MacOS. I don't play any competitive console games, so I'm not necessarily worried about a small amount of latency (<50ms).

Currently, I have both my Linux gaming PC and MacBook connected to the same monitor, but have to switch between the inputs on the monitor itself. I want to be able to be within MacOS/Linux and just flip on a display input and connect my peripherals to the other PC and use it seamlessly, for example, I'd connect my controller and boot into Steam Big-Screen and game. If I need to web search something, I can just use my trackpad to change virtual desktops, do something, then swap back.

Is there something like a lightweight OBS that will ONLY display the input once it's all set up? I want the app window to be literally the Menu Bar with Close/Maximize and nothing else so I can just fullscreen the app and never see anything but the input itself.