This kind of thing is already happening in terms with the online world. A lot of online websites for US players now are accepting Bitcoin. I received a letter in the mail from BetOnline trying to get me to deposit with Bitcoins for some bonus or whatever. Getting casinos to accept Bitcoin in real life would be a good idea. I haven't seen this happen yet, but once it does I agree, it could be big.
The government would like this idea as well since it would be harder for people to cheat on their taxes with gambling earnings when there is Bitcoin involved. Although, if Bitcoin becomes more mainstream then the opposite affect could happen since Bitcoin would be less likely to be sold at an exchange and used simply to buy things. Who knows what the future will hold though.
As I know from my friends and family members who are settled in America have told me that most of the people of USA are now accepting bitcoin because there are already a lot of other online businesses in USA.
So they are well aware of the importance of bitcoin and they have realized bitcoin as the new era digital currency for the whole world. it is a good sign for USA and the rest of the world as well.