One use case I'm imagining - being on a poor 3G connection and wanting to save something to your Dropbox for later. I don't want to have spent hours downloading

One use case I'm imagining - being on a poor 3G connection and wanting to save something to your Dropbox for later. I don't want to have spent hours downloading it over 3G when I can use this and have it ready on my otherwhere located desktop which will have it by the time I get there.