This could literally kick off a lot of things. Bitcoin would officially become a foreign currency for all nations.
Equador, which is the only country to actually pass a law banning Bitcoin (which the law only banned Bitcoin from running on its banking network) had a stipulation that it would be recognized if it became a national currency. So by passing such a law...they may have potentially forced themselves to recognize bitcoin as an official currency.
I wonder how US will deal with considering Bitcoin a commodity when it is officially a foreign currency as well.
http://www.newsbtc.com/2015/12/13/bitcoin-atlantis-currency/