AppAnnie has some new freely available research on “The Next Horizon of Emerging App Markets” (pdf). Brazil, Russia, India and China (BRIC) are driving download growth. Thailand, Vietnam, Argentina and Egypt are tipped by App Annie as the next countries to see growth.
For developers whose app audience is worldwide this means thinking more globally. Some things to think about include localisation (translation), pricing and in some cases re-designing for the target audience. Some apps might even benefit from a change of monetisation strategy based on the region. It might even be beneficial to think about apps only targeting the growth markets and their particular needs.