Welcome to London Calling, the place for mobile thinking. Since 2000 The Actionable Futurist, Andrew Grill has been providing advice, opinion and the latest thinking on all things mobile, digital and the impact on business and society. This blog is an archive of Andrew’s posts relevant to mobile advertising and location based services. To read Andrew’s latest thinking, please head over to his blog at ActionableFuturist.com

The fourth screen

Debate will continue about what “screen” mobile is – Nokia have crafted a clever 2 minute video, embedded below that argues: 1st screen = cinema 2nd screen = TV 3rd screen = [...]