It will work on high rez screens (I know because that is supported by KDE plasma). For color accurate work, you may have to wait until valve enables wayland on steam os or install windows on it. As for it’s own screen, I am not the person you are looking for…
Maybe try a FrameWork laptop. Just as repairable (if not more) and is an actual laptop that can help you do your work. Again, I don’t know if it could be color accurate enough for your work.