From the article (Bell speaking):
This is a memory surrogate, so I think of a machine as a memory aid and then, incidentally, your life ends up there as a residue because everything goes through there.
From a Digital Lives perspective this is what you live and breathe, and everything is there, so what more do you want?
What i want is security. If, as Bell seems to want, one's entire life is saved and categorized, what happens when someone else gets access? I am definately not comfortable with so much detailed information about me being collected anywhere but in my head.
Rather than ask the question, "what more do you want?", i think one should ask "why would you want this?". In Bell's case, i have to guess it is his age. With such a tool he can leave quite the legacy behind. i can't think of any other reason someone would risk using such a tool.