Each week Ross Rubin contributes Switched On, a column about consumer technology. While Microsoft's motivations in announcing Surface differed meaningfully from Google's when it announced the Nexus One, the Redmond company took advantage of the precedent that Google set in releasing a device that competed with those of licensees. At Google I/O, it was Google's turn to again approach the hardware market, this time with three devices that took the company into new categories and targeting different competitors. The trajectory of each produ
