I often think about the fact that my grandfather, when he was alive, had seen man go from the first flight at Kitty Hawk to men walking on the moon. If you think about that, it is almost incomrehensible for that much technology advancement in that little time.
I, too, have often thought about the technological changes my grandfather saw in his lifetime.
He was born in 1856 and died in 1955.
A short list:
trains, electricity, lightbulbs, indoor plumbing, toilet paper, horseless carriages, Wright bros first flight, radio, television, atomic bombs, super sonic jets.....
Simply mind blowing and all within the lifetime of a single generation.
