Each week Ross Rubin contributes Switched On, a column about consumer technology.
Portraying the digital still camera as an endangered species has been a popular pastime for years in the cellphone industry, and with the high-resolution stills and high-definition video capabilities of the latest round of smartphones, the argument is more convincing than ever when applied to the casual snapshot. But this week at the World Expo in Shanghai, Canon -- a name synonymous with high-quality photography -- offered a vision of a device that not only supersedes the digital still camera, but will likely eliminate photography as w
