Hi Hanan,
I enjoyed your post and agree that social media can be a positive influence on RA and transform the experience of users. I am not sure though that it has decreased the need for RA out of Libraries although it has created a dual role of in person and online. The proliferation of nor professional services and vast amounts of information can provide an opportunity for Libraries to implement best practice RA which assists more users to interact and engage with the written world in all forms. A platform for innovation and creativity.
Caitlin