Don't you wish you never had to worry about your
computer crashing or hard disk dying?
An idiot proof backup, and one where I don't have
to set _anything_ would be nice.
This could actually be worked around; once Dropbox enables per-folder sync, they could also provide a daemon (as an option) that automatically finds and sets up sync for any folder you seem to be making personal use of. Kind of like how Picasa works with pictures, but with everything on your computer that's yours.