For starters the look of tv has changed (as shown in the 2 pics).
It used to be as thick as about a ruler and a half and now they can be as thin as a piece of paper. Secondly quality. The video quality was different by much. Old television had very static like videos and now they are very smooth and fine cut. Lastly the amount of channels. Back then there werent as many channels as there are now, Especially of children's TV. Back then there was like.... 1 day a week with childerens shows.
They can help make the writing sound better such as adding commas colons and usage of capital letters, a list can help you use all these correctly when doing a writing