Going back 40 years you probably had a cat on top of the TV getting warm.
But with the death of the cathode ray tube, cats can't warm up on a modern thin TV. After all small animals lose heat more quickly than large ones.

So I give you the 'Cat Throne' that looks like a padded serving tray with a safe heat source for our modern day cats in winter and has a clean designed décor.

We used to say "she was warming her liver" when asleep atop an old TV.