I would like one desktop program that manages my social network profiles through one interface. I don't want another website for this. The precedent is Pidgin that manages three different chat protocols for me: MSN, Google Talk and Facebook chat, or Thunderbird that can access my work email (Exchange) or GMail. So what I want is a program that accesses Facebook and Google+, representing their common features in a standard way so that it doesn't matter whether a particular friend is on Facebook or Google+, and I don't have to check both to get all my updates. In a few years, more people will be fed up with Facebook and they may have moved onto something else, so this kind of standardisation is going to become more necessary as time goes on. I'm not holding my breath expecting standard cross-platform protocols for social networking sites, so this would be the next best thing.
Mokalus of Borg
PS - This is a big advantage of general-purpose computers.
PPS - And open programming interfaces for websites.