It's almost like a caricature of a CRT. I can see the novelty, but hope that people aren't lead to believe monitors looked like this.
I think what bothers me most is the horizontal line that slowly moves across the screen every few seconds. It's an artifact of recording a CRT on film and doesn't occur when you look at a real monitor...
It could happen in home computers connected through the antenna input. I think if power was slightly off the desired frequency this could also happen, but we’d need to test.