And then you get people who are helpless if there's a problem with the cash register and they don't have a calculator on hand, so they don't know how to make change.
I remember receiving blank looks when I reminded a clerk that I was entitled to a 5% discount on some item. They didn't know how to calculate 5%. "So figure out 10% and take half of that," I'd tell them, figuring that they would understand decimals. They didn't even know how to calculate 10%.
So I told them the correct amount, and they asked, baffled, "How did you do that?" (I worked it out in my head, of course)
A society of electronic technology-dependent twits is being created, and that is NOT a good thing.