If there is no group chat on FB then I think they are loosing by a point. People don't use Skype's because it is not free while for example iChat allows you to do video chat for free (for limited number of people). Now Google will allow it for free, and my expectation is that people will start using it. This may be one big plus for Google+, and a way for them to attract more people.
OK, the question I have here is about monetization. Who will get more money from this deal - Facebook or Microsoft/Skype and how? Skype has not been profitable for so many years (although they charge for phone calls and have ads), and I don't see this moving it closer to the goal.
Also, if FB allows group video-chat for free why would I pay Skype the subscription fee - I will just call from Facebook.