I don't even think it's the same across viewers. When my partner and I watch some shows, we make prediction for the plot and evaluations of characters. We even have a bet book where we record and score predictions for some shows. It's makes watching much more engaging, especially if the creators hide details and foreshadowing in the background. But you don't even need high quality content to do this, just tighten the restrictions. Law and Order and Hallmark movies only get 30 seconds of content before we make predictions.

It's much more stimulating than just passive consumption. If I don't do this I feel like brain turns to mush after a few hours of TV.