Switched On: Played out

Each week Ross Rubin contributes Switched On, a column about consumer technology. At the launch of the BlackBerry Z10 and Q10 -- the first hardware devices to run on the long-awaited BlackBerry 10 operating system -- there seemed to be a silver lining for the renamed company's struggling PlayBook tablet. Confirming speculation, CEO Thorsten Heins promised a cheering crowd that the PlayBook would receive an update to a new OS. This would open the door to signature features, a more polished user i...