How to Create an RGB-Display Shader

Felix Gerdemann shows how to set up a 'pixelated display' shader. 

I was wondering how they made displays looking so real in most motion-graphic reels. You know?
With smooth bokeh and moire patterns. But I figured out, that most of them are just filming real displays with their DSLR.

But this can't be very Hard in Blender right? It actually isn't and its quite fast to render. So why not going photoreal with displays too?