Thousand Year Game Design

Here is an interesting idea:

Challenge
Create a game. The game can be of any theme or genre you desire, but there is one restriction: You're creating a "new classic," like Chess, Tag or card games. So, create a game to be enjoyed by generations of players for a thousand years.

Prize
$1,000 to the winning entrant, to be announced and awarded January 1, 2012.

Details at the link. I've mentally played around with game creation for some time. Almost all of mine have been too complex and niche to be considered an all time classic. It would need to have some compelling simplicity. Would reward some kind of skill but be open enough that new comers would enjoy it.
Hmmmm.