1) The document discusses how mobile location-based advertising has yet to reach its full potential due to high costs and technical limitations. 2) It argues that the "Starbucks example" of location tracking consumers every 5 minutes would cost almost £5 million, making it infeasible. 3) For mobile advertising to grow, advertisers need more data like consumer locations, as well as the ability to precisely target ads to relevant consumers in context. 4) Several companies are working to enable more accurate and large-scale location services to help mobile advertising scale up.