We're already there, at least half way. From the point of view of authorities investigating a citizen - there is no anonymity today. A citizen, suspected of a crime will have all his e-mails read, also interactions on social networks, text messages, etc. for the past few years will be thoroughly analysed. Big media companies are required to keep long records so that governments can read into the past of their users in case a crime occurs. This lack of anonymity already prompted creation of encrypted messengers and other sorts of relatively safe means of communication for those not content to live in the matrix of greed with passport entry. Furthermore, there's constant pressure applied by governments to social media companies to stop proliferation of anonymity on various grounds of legality and national interest. I am fairly certain I have found my interest and hence my position in this ongoing debate.
Giving even more of my personal, locational, medical information to this international conglomerate of greed... well, I'll just say I am not entirely convinced it's such a great idea. I like my (however relative) anonymity of today. And I would like more of it with time, not less.