The point is that you want to have a system that is responsive.
Most of the bright people don't work for you - no matter who you are.
You can't prove anything about a program written in C or FØRTRAN. It's really just Peek and Poke with some syntactic sugar.
Document preparation systems will also require large screen displays.
I just don't like to lose what's in the window.
Bitmap display is media compatible with dot matrix or laser printers.