Power to the mobile OS

Although mobile technology and cloud services are in their infancy, there is a major gap that eventually (perhaps years) needs to happen in my opinion: divorcing apps from specific cloud services. Take my recent experience using Grafio (a drawing app on the iPad) for the first time:

The problem is that there is a direct, two-way connection between Dropbox and Grafio (as well as Box, as the first diagram below shows) that is fragile and requires each app to maintain. Instead, if iOS offered a...