What Won't Our Kids Ever Know?

A friend of mine just posted an interesting anecdote about the difference in the world we grew up in and the one our kids are growing up in.  In his case, his son didn't know what a stereo was.  He'd never seen one.  Music in his world comes from an iPod/Zune or from a computer.  That got me thinking.  Technology is changing the world quite drastically.  What other things that were common in my childhood will my kids never know about?

They won't know telephones that have wires.  All of ours are cordless (or cellular).

They won't know a world where you only have a handful of TV channels.  We visited my grandparents' and they were perplexed by the fact that there were only 3.5 channels.

They don't understand live TV.  Everything in their world is timeshifted by Media Center.  TV schedules are an unknown to them.

They won't ever have to think about long distance phone calls.  Calling Florida is no more expensive than calling next door.

They'll never know a world where the internet is not at their fingertips at all times.  Modems?  What are those?  Encyclopedias?  What are those?

No Saturday morning cartoons.  This doesn't really fit the list, but it's true.

I'm sure there's a lot more that could be added to this list.  What other things will kids of this generation never experience?