According to the information datamined, there were references made to a new currency called Platinum, as well as features such as timed experience boosts, new cosmetic items such as wings, non-combat pets, and character portraits. All of this seemed to suggest that Blizzard was interested in selling these services and features to players, but unfortunately not much information is available on these features at the moment.
Now for gamers who might be worried that these features could “ruin” the game and make them spend more money that they would like, you can rest easy as it turns out that these microtransactions will be limited to Asia for now. This was confirmed by Blizzard on their forums where they confirmed that these new features will be not available in the Americas region.
“We recognize that many players have expressed an interest in microtransactions being added to Diablo III. While we may explore this model in some regions, we have no immediate plans to implement such purchases or the aforementioned features anytime soon for the Americas region.” It is unclear if and when Blizzard will introduce them to the Americas region, but hopefully more information will be made available at a later date.