I just got invited, and I have no clue what I am doing on there... I don't know if they can really pry people away from Facebook... maybe as an addition to Gmail? But really I think Google is a little late on this release, and it sure isn't an Android!
Here is a little video of what it can do for you.
[kml_flashembed movie="http://www.youtube.com/v/xwnJ5Bl4kLI" width="425" height="350" wmode="transparent" /]
So apparently there are 6 things that Google+ can do that Facebook cannot. Most of them I wouldn't find myself doing anyways. Watch the video and check out this webpage for the full out story.
Update : I must admit, i didn't watch the video until this blog had already been posted, it's pretty neat... I definitely will give it a try, but I still don't see it taking too much away from the juggernaut that Facebook is...