Yes, the bitcoin price is getting high enough that it is becoming difficult for some people to think in terms of whole bitcoins. For smaller transactions we may need to start using mBTC or "bit cents" (0.01 BTC). It seems silly for those of us who are accustomed to dealing with mathematics, but the size of numbers can really be a psychological barrier for some people. So having 500 mBTC can seem like a significant amount of money but if it is stated as 0.5 BTC it somehow seems like a much smaller amount even though mathematically it is the same.