Digital technology is becoming a dominant force in the development of next-generation business models, but enterprises have yet to realize more than half of its full potential, according to a 41-nation survey of more than 2,000 executives. The poll, conducted by Gartner, reveals an emerging dual leadership model in which chief information officers will be challenged to expand IT's strategic business role by applying mobile, Big Data, cloud and other technologies amid stagnant or shrinking budgets.