I see this thing in engineering offices
Having worked on CAD workstations I know how frustrating it can be to have a team hunched over some tiny little screen showing a fraction of a design through a peep hole. With such a screen, you could finally show a significant part of the design and discuss it with others. No more scrolling, just your whole blueprint on one big screen. Everybody can just go there and look at the parts they are interested in. No more printouts just to talk about a design.