I think it was about a 25% weight difference
25% of what? Because I can guarantee it wasn't airframe weight, or even fuselage weight...
The problem with view screens is unless you give every passenger their own camera that they can pan/scan, it's not going to be even remotely the same - you'll be looking at the camera view, which probably won't be the view of interest.
It's not as important at night (although I've seen some pretty cool stuff at night as well) but some of the most spectacular scenery I've ever seen has been out the window of an aircraft (and I used to go backpacking in the Rocky Mountains - in large part for the views). If I'm paying for the ticket, I'm not willing to give that up...