I think Google+ should be more than it is.
Right now it’s basically another Facebook with better features. The social grouping is better, the messaging is better, and the video conferencing is better, but each of those can already be found in good enough quality on Facebook. Unfortunately, better messaging isn’t going to get Joe Average to sit down in front of his computer and try something new. Circles are great, but they aren't going to get Joanne Normal to dump her 300+ strong social network.