![Wink ;)](./images/smilies/icon_wink.gif)
The point is to use the network in games it usually isn't used in (single player, etc, anything but a MMO). Making the actions of one player visible for some other player, delayed.
For example, you moved some object. For the next player that object could be in its new place. Or maybe you broke a window...
It wouldn't have to be limited to eye candy either; it could affect NPC behavior or the placing of critical items too, within sane limits. Nor would it require a network connection, it could work optionally, when a connection was available.
I think it would create a feeling of a dynamic world much better than randomness or AI ever could. In that thread it was also mentioned that it could be used to make you visible to someone else as a NPC.