Satoshi, are you endorsing the idea that additional block chains would each create their own flavor of coins, which would trade with bitcoins on exchanges? These chain-specific coins would be used to reward miners on those chains, and to purchase some kinds of rights or privileges within the domain of that chain?
It might be coins, but it doesn't have to be. Your reward could be a portion of namespace, ie. the domains themselves.
The possibilities are endless.
Bitcoin rewards you, essentially, with a piece of [digital] property.