I see an assault on Google+, not on Facebook, so Facebook will do what it does best without any disturbance.

Doesn't socl translate to Subscriber Out Card Left ?

"we can probably expect Google to add a similar feature to Google+ or upgrade its Hangouts to allow video sharing."
That feature has been in Google+ from day #1. (Although microsoft was the first of the two to come up with that concept with one of its region specific xbox features)