That, barring a cataclysmic implosion of civilization, the internet archives being populated now will likely be available for perusal 10,000 years from now.
As a corollary thought, an interesting exercise might be to only generate content -- movies, essays, fiction, non-fiction, whatever -- that you think people 10,000 years from now will find interesting. How does this constrain what projects to undertake?
This is another reason to study history: so you can imagine what people a thousand years ago would have liked.
Somehow I feel compelled to add an evil laugh at this point.