Do you use Windows, macOS, or Linux? iOS or Android? Today, these seem like meaningful choices, but five years from none of us will care about any of those because our agents will function as operating systems or platforms, Gates writes. Today, if you want to write an email, you might open Gmail or Outlook. If you want to create a document, you might open Microsoft Word or Google Docs. But five years from now, you won't do any of that, Gates predicts. "You won't have to use different apps for different tasks," he writes. "You'll simply tell your device, in everyday language, what you want to do. And depending on how much information you choose to share with it, the software will be able to respond personally because it will have a rich understanding of your life."