Facebook as a safe shelf

Day by day we see new features in Facebook. It's easy to notice that Facebook gives you back all information that you have ever shared. Facebook is becoming not only a tool for Social Media Marketing, for communication but an easy folder where you can save photos, documents, links, etc. If they are private you can choose whom to see them. 
This strategy is a cool differentiation in Social Networks market.  
Today Facebook has loaded groups' new features. Now you can enlarge your group's photo which will look like  your timeline's cover photo or you can give chance to see some members of the group.  Group members, events, photos, docs are visible and it's easier to find or add them. 
 For promoters, social media marketers there is a question: Facebook pages vs. groups. Search engine helped me to find this Google doc . Here is a table which helps you to compare Facebook fan pages, groups and LinkedIn groups. Which one is more useful for you? You should know the answer better. 
Based on my Facebook experience and articles that I read  Facebook likes do not work so much. Like does not mean that I read your posts every time, I like this page so much.... or I'm interested in this page. It is not so. 
What do we have in Facebook shelf now? 
Now groups are more visual, old informations are not lost, communication is better and flexible.
Fan pages are really week.
Are they going to disappear? Do they have no future?