Step 4

Now with the Polygonal Lasso Tool select the area of the display.
Select the original image layer; right click in the selected area and go to Layer via copy.  This will create a new layer out of the selection you just made.




Step 5

Now hide all layers except the recently new layer of the display cut-out.
Select > Edit > transform > distort
Now drag all corners to there respective corners so the image fills the screen, don’t worry that image looks distorted/skewed.





Save this image to USB drive, network share or something that you can use to transfer the image to the laptop with.

Step 6

Transfer the recently saved image to the laptop and make the image your desktop background.

Step 7

I hope you camera is still the same position as before. 
You should now have you laptop or device in the same position, have desktop background image that looks like peering thru transparent LCD.
Take another digital photo and you are done. Show you friends, they will be amazed!