Premium paid-for currency on its way. http://www.bit-tech.net/news/gaming/2015/02/24/blizzard-dabbling-with-diablo-3-microtransa/1
There were duplicate posts on the EU and US forums so it's not coming to EU either (yet) http://eu.battle.net/d3/en/forum/topic/13686810330?page=1
a lot of people don't think it will - since unlike in the EU , a lot of people rent the games over there ,whereas we buy them - so micro transactions make more sense over there