In 1900 someone attempted to predict what life would be like 100 years later. Some of his predictions were incredibly accurate, and some seem laughably naive.
There will probably be from 350,000,000 to 500,000,000 people in America and its possessions by the lapse of another century.
Take-aways and food delivery:
Ready-Cooked Meals will be Bought from establishments similar to our bakeries of to-day.
X-Rays (the most impressive prediction, in my opinion):
The living body will to all medical purposes be transparent. Not only will it be possible for a physician to actually see a living, throbbing heart inside the chest, but he will be able to magnify and photograph any part of it. This work will be done by rays of invisible light.
Everybody will be ridiculously fit:
Everybody will Walk Ten Miles. [...] A man or woman unable to walk ten miles at a stretch will be regarded as a weakling.
Strawberries as Large as Apples will be eaten by our great-great-grandchildren for their Christmas dinner a hundred years hence.
Pneumatic tube delivery:
Store Purchases by Tube. Pneumatic tubes, instead of store wagons, will delivery packages and bundles.