Because that paradigm is currently restricted to rich people in first-world countries where always-on fast internet is ubiquitous and you can sync everything to

Because that paradigm is currently restricted to rich people in first-world countries where always-on fast internet is ubiquitous and you can sync everything to the cloud without much trouble. The rest of us will continue using not-very-high-capacity USB sticks to move photos, videos and other data around for the foreseeable future.