Instead of having black screens for DOO monitors in cabs like the 700 or any Electrostar, I subject you use the same technology you used to make the platform screens on the Bakerloo line. I don’t know how resource intensive that would be but if you could take an image of each station and CCTV-ify them I’m sure it would be much better than having blank screens.
It would certainly bring the cabs to life. It seems odd having no functionality on the plethora of screens in the modern cabs. Good suggestion.