Cell phones and no cable TV
Ones that comes to mind almost immediately: Cell phones and pre-cable TVs.
Tell kids today that in the "old" days you couldn't just get a telephone call nearly anywhere you were at. Unless you carried a walkie-talkie, and that doesn't really count.
Or that in the "old" days, TVs were mostly black-and-white and you were lucky to get just a few stations that came in clearly. And cartoons were only on Saturday mornings!
And you had to watch the program as it was presented in the time it was presented - ONLY!