I agree with most of what you write save the fact that Dropbox is not a feature. I use dropbox constantly to the point it is invisible to my work. My files move around without me worrying about it. From a consumer point of view (ie, non-tech) how your files synchronize doesn't matter. The fact that the files are there when you need them is what matters. In the consumer eye, Dropbox would be a feature of all their devices.
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I agree with most of what you write save the fact that Dropbox is not a feature. I use dropbox constantly to the point it is invisible to my work. My files move around without me worrying about it. From a consumer point of view (ie, non-tech) how your files synchronize doesn't matter. The fact that the files are there when you need them is what matters. In the consumer eye, Dropbox would be a feature of all their devices.
As long as enough people are willing to pay for the 'feature' I'm sure that the dropbox founders don't care too much what people call it :)