In 20 years I predict I'll still prefer executing code at the local OS level to thin client code hosted within an application running in the local OS. And having the application state updated after accessing local memory rather than after communicating across a network. We don't have to wait 20 years to experience the benefits of hosted applications, we have them today. And they sounded good to me. But after enjoying those benefits, I'd still give them up for the reliability and responsiveness of native applications.