If your parents could parachute into your life for a visit, what do you think would surprise them the most? They may have been around to see desktop computers, but they would be surprised to learn that the phone in your pocket has more computing power than those desktops, that you pay your bills online or that something called Facebook has 2.4 billion users.
They wouldn’t know that using the word “they” as a single pronoun is now grammatically correct or that someone could run 26.2 miles in under two hours or that people don’t buy encyclopedias anymore.
All that is important, but what I’d want my parents to know is what amazing great-grandchildren they have. Isn’t that what really matters?