A new report from Juniper Research indicates that a growing user acceptance of in-game purchases and a sharp rise in smartphone adoption will push sales of in-game items from $2.1 billion in 2011 to $4.8 billion in 2016. A key driver of this development will be gamers and games developers: the proportion of gamers who purchase in-game items will increase, while developers will increasingly adopt the freemium model rather than the pay-per-download model. The firm anticipates the trend will be most pronounced in the social and casual genres, where consumers have grown to expect compelling mobile experiences for free or next to nothing. Release