Except that they should have less required work screen time because they're retired? A large variety of today's jobs involve sitting in front of a computer 4-8 hours a day, so on the face of it, retired people have more options.
But the observations of this article aren't that surprising to me. What doesn't require screen time these days?
Mainly exercise, in-person socializing, and reading paper books.
Exercise and in-person socializing seem to be naturally reduced for older people. (Of course I can think of a few people that are exceptions)
And even reading paper books is less of an option for older people with reduced vision. My grandfather lived to a very old age and I believe it was easier for him to watch TV than to read books.
Ironically I feel like almost everything else involves a screen: travelling seems to increase your attachment to your phone, socializing with family is often done through a screen, anything in "media" like making music or video often involves a screen, etc. Planning vacations, doing your taxes, financial planning, etc. are all very screen-centric IMO.
The article is (confusingly) not about all screen time, but just media consumption. I assume that 'media consumption' would not include tasks like doing work or financial planning, or taxes, or vacation planning, etc.