Comment by keepamovin

Presumably the display can fade opaque, or translucent to give a readable background to text or when desired.

Many applications for see-through screens: HUDs, AR, literal camera viewfinder, tile-ability, low-weight.

Also just the general flex and coolness that a "no visible seams" (I mean no visible wires/metal) approach will bring - a case of form meeting function - the screen in the abstract sense is an abstract - a general portal through which anything can appear. A "pure screen" is the physical realization of that.