I must be mistaken or something but aren’t there already QD-OLED monitors currently available on the market?
I have a feeling you might be extremely satisfied with the image quality provided by the C3, however, for peace of mind the Samsung Q90C seems like an excellent option for your particular use case. Do remember that using a TV as a monitor might have a few quality of life caveats, for example not supporting sleep and wake properly as well as possibly not supporting all PC resolutions via HDMI.
Do note that the Q90C uses a BGR panel. I like the fact that it might probably get bright enough to provide a better experience using BFI than the C3.
I’m not sure if the Samsung software is as good as LG’s overall thosame
I think with either one you’ll be satisfied with your purchase but you would have to adopt responsible OLED panel user etiquette in order to preserve your display if you go that route.
Not all use cases are the same which means not all users’ risk of buy-in would be identical.