I would look into removing the "computer" that is doing the spying, and driving the panel itself directly (eg from an Apple TV, Raspberry Pi, whatever you consi

I would look into removing the "computer" that is doing the spying, and driving the panel itself directly (eg from an Apple TV, Raspberry Pi, whatever you consider trustworthy). The panels usually use eDP, MIPI/DSI or (in case of older laptops) LVDS internally. I've seen it done - a friend swapped the screens on two completely different laptops - one did work, and well, one didn't ;) but 50% success rate for a random guy with a screwdriver is not bad. I wonder what would happen if we could identify a particular cheap, mass-produced, high-quality screen / panel that'd be easy to DIY.