True, but I also think it will be interesting to see whether the users that get a Google+ account actually use it. I use Twitter for purpose-less tech/business opinions. I use Facebook rarely to talk to my brother and sister. I use Skype for work conversations. I don't yet see people using this enough for me to want to move to it.

edit; If they created some kind of BBM-type android service that sat on top of Google+ I think it would make me switch my SMS usage because I have a lot of friends that use Android phones...