Google+ isn’t only a social network. It’s the very backbone (and future) of Google itself.
As Brian Clark wrote yesterday, authorship and the possible effects on the Google algorithm have the potential to be extremely beneficial to savvy content creators.
If you’re a writer, this is either going to be very good for your career, or you’ll risk becoming relatively invisible online.
If you’d like to land solidly in the former camp of writers, the question becomes one of how to use Google+ to further your own goals.