Surely this would have been easier to recreate with practical effects? You can get the same pixelated effect looking through translucent privacy door screens.
Westworld wasn't just a fantasy, they were doing 'real' science fiction in that they were saying look, this is happening. Here's what computers can do right now.
There are plenty of examples of faked CGI back in the day. As has been pointed out, alongside some CGI TRON had a lot of hand drawn cell animation. The 'wire frame' of the skyscrapers in Escape From New York was done by building it with black painted models, edged with neon strips. In both cases it is possible to tell.
