Each week Ross Rubin contributes Switched On, a column about consumer technology. In the pre-smartphone era, the industry focused on making cell phones smaller. In the 2001 movie Zoolander, the title character played by Ben Stiller uses a humorously diminutive flip phone closer to the size of a Bluetooth headset than the StarTAC it parodies. But if the movie were being made today (IMDB lists a sequel slated for 2014), the fictional male model might hold up an iPad 2 or
