I often think about what we grew up with (we meaning 50+ somethings) vs. our parents, grandparents, kids and grandkids.
Like we grew up where everyone (mostly) had electricity, B&W TVs, AM radios and rotary phones, and a car.
Mom on the other hand lived on a farm and had a single light bulb powered by a windmill in the yard, did homework using cables and kerosene lamps, and probably had an AM radio. I kind of remembering her telling me that had to use a neighbors phone which was over a mile away. They still used a horse and buggy and got a car much later.
Grandma, if she was lucky maybe had lights and a rotary phone as a kid if she lived in the city and definitely had a horse and buggy.
My kid on the other hand has never not known a world without color TVs, computers, modems, the internet, cars, ATMs. portable FM radios and tape players, video games, microwaves, cell phones, etc.
My grandkids have never known a world without big flat screen TVs, iPods, iPads, smartphones, PS3, Skype for talking to granny and gramps, etc.
The next generation will always know stuff like Google Glass (smart phones? you mean COMPUTERS?), Self-driving cars, wearable computing devices or implanted cybernetics, 3D printers possibly actual replicators, and most likely a bunch of cool virtual reality, 3D and holographic stuff we're barely starting to get off the drawing board let alone serious products.
But I'll hazard a guess I know something most of the current and future generations will NEVER see...
... an OS command line prompt :)