This is exactly the comment I was about to make. It becomes a relatively simple mental exercise to guess the possible effects of each item in the scene on the plot.

I think many of the better movies out there are known for adding details that do not play into the plot, but which are there more for art's sake. It's something that is usually appreciated where it occurs, and it definitely improves the quality of the movie.

But it's pretty satisfying when details are still relevant but simply misleading or difficult to put together. In my opinion, that's the ideal scenario. It's ok for superfluous details to be there for the sake of texture but depending on how it's done, it may cause the script to lose its "tightness".

Westworld is one of my favorite shows because I think it accomplishes this very well (S01 and S02, not S03). There are a myriad of details, you get the feeling they'll be important but there's simply so much to keep track of that it's very difficult for it to become predictable and boring.

Westworld is one of my favorite shows as well. (Have you seen Person of Interest? Same director, similar themes later on around S3-4)

I think you're right, that westworld doesn't have a lot of superfluous details - but the degree of plot complexity required to make use of all the details it contains has led some critics to call it convoluted.

On the other hand, the Lord of the Rings trilogy - the movies are full to bursting with strange details that never make any difference to the story. Bilbo's birthday party is one immediate example - there's a bare minimum needed to establish some characters, and then on top of that are details just there for the sake of themselves.