We might look back at this thread in 5 or 10+ years and have a laugh. I've not read every post, so perhaps this has already been stated: The window debate may not have many years left because windowless planes are possibly coming and are much better in terms of structure, fuel consumption, weight, speed, etc. There's many articles on this. Just Google "future airplanes no windows".
So if this happens, it will end the shade debate. Well, mostly end it. The projections inside will not be nearly as bright as a true view from a window, while the 2-D projection replacement is just not going to be an acceptable substitute for the shades-up people. Hence, the shades-down people might get the last laugh
Of course, a VR headset would be a lot better, but that wouldn't provide the powerful effect of casting light on the shades-down people. It's a lose-lose situation for the shades-up crowd.
I'm sure many/most of you have seen the articles about future planes possibly not having any windows at all. Instead, there will be fiber optic cameras that are used to project an image to