Google + is a give very good option like a circle. i shared the same thing of my friend. its good option for me. i used the video chat many people at same time. its very good feature for us.
I have created google plus account but so far it is not that popular yet compared to facebook. There are still a lot of people using facebook for business purposes.
Well, good rankings are what I really love when t comes to Google+. The second thing is that is has even greater potential, and i foresee that Google is goin' to put most of SE weight onto G+ links.
Yes, but do you want to be ahead of the wave or behind it. Google+ is so new and it is being advertised and implemented by big G this year. Contact me if you are interested in more info and a way to get toms of people added to you in G+.
Facebook has got apps and market hold. Moreover, users don't prefer to migrate much unless there's a very good reason. And trust me there isn't any very good reason to migrate to G+. Although I personally think if someday some developer or Google itself comes up with a program/app that does the migration stuff from FB to Google, then everyone will prefer to migrate since people trust Google more than anything else.