Well, if "do we really need this" was a viable yardstick for the value of innovation, nothing significant would have been invented in the past 100 years.
And telling me that the relationships I have on Facebook are worth less that not having them at all because they are on Facebook rather than on the phone(x) is incredibly arrogant and, well, none of your business.
(x) Never mind that they would have significant trouble reaching me using any of the 1998 contact information they have on me. Except for my name, which happens to be fairly unique, none of it is valid today, nor was it already by 2000.
