Q & A...

The question:

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

To expand on the while there are a lot of obvious differences between now and 1950 in terms of technology, culture, etc., I wonder which changes or new things they'd grasp easily and which would be utterly perplexing.

The best answer (awesome++):

I possess a device, in my pocket, that is capable of accessing the entirety of information known to man.

I use it to look at pictures of cats and get in arguments with strangers.