Smartphones exploiting sensory information and combining it with geolocation services should be a powerful tool for indoors advertising and marketing in the near future, according to an ABI Research report. That sort of "sensor fusion" should be a feature of 1 billion smartphones by 2016. Still, only when that fragmented data can be combined and delivered easily to marketers will it be able to deliver "more contextually relevant services," says Forrester Research analyst Sarah Rotman Epps in a separate study.

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