I remember ordering things from Sears and Roebuck. From the catalog. Three times a year we'd get a new Sears catalog and pore through it. If we wanted to order something, we'd get out the pencil and write all the information concerning our purchase and whereabouts and drop it in the mail. Several weeks later we'd be surprised when the mail man (it was always the US Postal Service and there were no women delivering mail) would bring a package to our door.
Today I click on a couple of blue links and make an order from a computer that's not connected by wire to anything. Later that day I get an electronic message from the shipping company, telling me that they've started moving the package from across the country and tell me when it'll be delivered to my house.
One day last summer I was waiting for a package and clicked on the tracking link. I saw a notation that the delivery guy had given my package to the lady standing by the mail box. I called Milady on the phone she carries in her pocket and she told me that she had placed the package on my work bench before she left home to run some errands.
Thirty years ago, this would all have been fodder for science fiction. I'm awaiting a package this morning, and I know that it left Jackson, MS, at midnight this morning. It's on-time for delivery tomorrow.
We don't have flying cars yet, but we live in the future. I am continually amazed.