Actually, contract law is a perfect area for Bitcoin to expand into.  Read up on Smart Contracts (http://en.wikipedia.org/wiki/Smart_contract).  Because Bitcoins, which are subjectively valuable, can be so easily manipulated at the program level, it's only matter of time before we have easily accessible contract enforcement outside of the traditional state court system (advanced escrows, specialized arbiters, self-enforcing contracts, penal bonds....).