Dozens of physicians, health consultants and other medical experts have gone on the payroll at Apple and Google to drive research. Amazon’s secret health team – called 1492 – is exploring new platforms for electronic medical records, virtual physician visits, and health apps. Predictive analytics, automated diagnoses, and wearable sensors are other areas of digital opportunity. Recognizing the clinical implications of these efforts, the US Food and Drug Administration (FDA) has announced a Digital Health Innovation Action Plan to safeguard health technology. Will it truly transform health care, or has hype overtaken reality?