The future is translucent tablets ( smart glass pads ). It's not about what this UI is - it's about where it's going. This is the UI to bridge to the next hardware modality and begin to train people to prepare for (at first) HUDs everywhere, then smartglass and holoprojective displays.
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.
