Rather than close or minimize a phone window to interact with a background application like a music player, users could control a primary application, like email, via touchscreen or keys, and manage the background application via gestures, said Goren.
Even in rural parts of the U.S. it can take hours to drive to a specialist, while a primary care physician might quickly email that specialist a photo of, say, a diseased retina first to see whether the trip's really necessary.
Increasing use of email by both enterprise and consumer customers as a primary means of communication is driving demand for smartphones like the iPhone.