By Sam Grobart via:yahoofinance Ariel Dunitz-Johnson, a 30-year-old illustrator in San Francisco, bought a point-and-shoot camera in May. But in July, she bought a smartphone, with a camera built in. Soon, whenever she wanted to take a picture, she found herself reaching for the smartphone, a Droid Incredible. She barely uses her point-and-shoot, a Panasonic […]