If someone from 1950 suddenly appeared today, what would be the most difficult thing to explain to them about life today?

(Please correct my grammar, punctuation, etc)

I think, one of the hardest things to explain to them probably will be how has advanced technology exponentially from the years 1960`s for example in those years a computer occupied a room but now we have computers do not need too space in addition are very fast and has so many options which you can't get over how does it works , else to add would be cell phones in these times people were not able to communicate with each other, but now we have smart devices have plenty of options such as to get in touch with your friends, relatives and so on around the world by calling them through a call or if you want via social media, as well as you can take impressive photos is due to the magnificent cameras that have been developed by engineers have a good definition. I'm sure you'll fall in love with this as soon as you see.