Why? What benefit is there in replacing windows with a screen that replicates a window?
The screen is a transparent window, since these are transparent LCDs.
However, in IFR conditions, when all you see outside is white or black or grey for that matter, the LCD 'window' will be switched on, and it will display:
1) Infrared visuals such as in the video here:
Gulfstream Aerospace - Technology - Vision Systems
2) Synthetic Vision display
Windowless cockpits have been suggested.
Airbus patents windowless cockpit that would increase pilots' field of view
What I am suggesting is a hybrid windowed/windowless cockpit. Of course your operating manual will have to cover failure modes and all that.