Did you know Facebook turns 15 years old this month? (Although there are several alternative dates for marking Facebook’s founding, Mark Zuckerberg launched his once “clean and simple” social network from his dorm room in Kirkland House (Harvard College) on 4 February 2004.) So, have we reached “peak Facebook” or “peak Google” yet? Even if we have, will Internet giants like Facebook and Google last another 15 years, or will they crash and burn before then?