I wrote this about 18 months ago, and much of it still holds true:
The future of VAS will be driven by many independent VAS operators who drive consumption of data services and thus drive up data revenue to more than compensate for the fall in voice revenues. Think of the multiplier monetisation that could have been happened on the Internet had there been an inherent subscriber billing option – this is where the mobile industry stands apart. The microbilling option combined with an open access platform for data services with the actual data revenue being retained entirely by the mobile operator is what can grow current VAS revenues to 10X in the coming years.