A close eye on PlayStation Network users' buying habits told Sony that it had to go digital with the PSP Go, hardware marketing director John Koller tells Gamasutra.
"The impetus for the product was that over the past two to three years we've seen a sigificant increase in digital demand," he says. "We've also been looking at how consumers track."
Although Sony has never released year over year increases in digital download by percentage, Koller says it's the boost has been "significant" lately. Couple that with the obvious growth of other mobile digital media platforms, says Koller, and "digital really starts to ramp up."