Google

Obviously people were taking screenshots of films and then stitching them together to make gifs for entire 2 hour films, so this is all about stopping piracy! /s

The author of the article has no theory why they might have done this. I'll suggest that maybe screenshots are used as a way to document obnoxious advertising, and Google would like to make that as difficult as possible.

Funny I usually just take a picture of the with contrast bumped and black levels lowered.

Personally I would very much like an easy way to screenshot the TV and send it to my phone

Yet again a company decides that it's better for us to not have what they sold us. I wonder what the replacement product will cost it which agency is paying them to stop us.