The lowest friction solution always has a big advantage.
Under your solution I have to take a dumb laptop , a smartphone and a bluetooth headset with me everywhere and hook them all up together whenever I want to sit down and do something, bluetooth headsets are particularly cumbersome compared to putting a phone to your ear, not to mention that they make a lot of people feel dumb to wear.
A "cloud" solution that is fast and smooth enough will replicate the functionality of having one "mega device" without the drawbacks.
I actually think that the cloud will become the place for everything for a conceptual point of view.
If you are concerned about privacy etc it will be possible to run your own personal cloud out of a tiny PC in the corner of your home.
Some concessions will have to be made for offline use of course (which I guess will become increasingly rare). Really though it makes more sense to think of your devices as an extension of your "cloud" rather than the other way around.
A "cloud" solution that is fast and smooth enough will replicate the functionality of having one "mega device" without the drawbacks.
I actually think that the cloud will become the place for everything for a conceptual point of view. If you are concerned about privacy etc it will be possible to run your own personal cloud out of a tiny PC in the corner of your home.
Some concessions will have to be made for offline use of course (which I guess will become increasingly rare). Really though it makes more sense to think of your devices as an extension of your "cloud" rather than the other way around.