I can't wait until they open up Google+. As far as I can tell, they're still in danger of a Wave repeat, where the hype burns out too early. There are tons of people still out there with their noses pressed up against the glass, unable to join in the fun.
Games are a big deal, though. They'll keep people on G+ even when there's nothing immediately social to do, and increase interactions between people, this time in a non-spammy way.
Hi starwed, I'd love an invite to google+ if you'd be willing. I'm not an FB user, but the google folks have me all curious. My email is in my profile, and thanks a million!
When I look back at my switch from MySpace to Facebook though, it took a long time before I fully made the switch. I made a Facebook account, logged on, didn't find too many people, so I went back to MySpace.
A couple of months later and Facebook kept getting better and MySpace kept declining mostly due to the spammy nature of people's horrible HTML tastes (read: Geocities).
Now Facebook seems like a similar case to me. The games were getting spammy, the quizzes my friends took to find out which character from Sesame Street they were are were getting spammy, the layout kept changing every week, and I kept finding annoying bugs.
I expect the same story to be repeated. Google Plus is the next iteration on social networking. They learn from the previous' mistakes (just like Facebook learned not to let people add HTML to decorate their profiles). Google Plus is imo a more polished, more thoughtful iteration on Facebook. SO I am not too worried.
Google has invested a lot in this move, and I hope and trust they will continue to improve it for a long time.
Games are a big deal, though. They'll keep people on G+ even when there's nothing immediately social to do, and increase interactions between people, this time in a non-spammy way.