Analyst firm Juniper Research has released its latest mobile games report, claiming that the industry's retail value will climb from $5.4 billion in 2008 to more than $10 billion in 2013.

This time last year, Juniper predicted that mobile games would pass the $10 billion revenues mark in, ahem, 2009. Shifting the milestone to 2013 is a pretty significant change.

Perhaps there's an answer in the problems identified by the report, including low revenue shares on operator portals, and poor games marketing.

"The revenue share offered by Apple to games publishers is incredibly attractive," says author Dr Windsor Holden.

"The danger is that if operators do not respond with a similar business model, publishers faced with low margins may simply exit Java completely, thereby reducing consumer choice in the longer term."

Other conclusions drawn by the report include that while ad-funded mobile games are increasing in popularity, they're unlikely to provide developers or operators with a primary revenue stream, particularly as advertising budgets fall in the economic downturn.

However, the report is more positive about the potential for mobile games growth in India, Africa, the Middle East and South America, thanks to increased mobile adoption, and low penetration of games console and fixed-line internet.