By way of Rod Dreher I just read, well... skimmed, a post about what from our post-1950 culture will survive 200 years from now.
It's an interesting intellectual idea, but the guy that Rod linked to droned on forever and nominated a bunch of stuff that sounds like some sort of weird Currents State of the Arts Review 100-level class at a private college somewhere in the Pacific Northwest.
There really is only one answer to that question: Tom Wolfe. He is much derided now, just as Charles Dickens was much derided in his day, but no one person illustrates what our society is going through more clearly than Wolfe. I'm already looking forward to his book about Miami, and schoolchildren who bio-download that work just after Tale of Two Cities in the year 2208 will enjoy it, too.