Facebook will probably eventually die out like my space and friendster did, social networking works in lifetimes.. You have to renew it to stay young and attractive! This means that you as the consumer or user have to stay interested, which can only be done through consistent updates and additions. Whats hard now is coming up with an original Idea, most of it has been done for social networking (however there are those not so mainstream ideas) that being said, why would facebook users change to google+? They have to offer different and yet the same features. Then again like everything else facebook might die out in a few years, though they didnt have smart phones and the technology they have now 5 years ago!