But your threat level going forward is likely not just an individual, but rather the big data collection of corporations such as Facebook and Google which track every damn thing we do via cookies, etc.. And the likelihood these behemoths will be forced to cooperate with the NSA in the coming 666 world order that is developing. Have you all not seen the proclamations of the G20 to cooperate on sharing information about tax evaders? Have you all not seen that China has 10 cameras on every rooftop and London apparently the same. And even if one argues these behemoths won't target you as a nobody, don't forget their employees or hackers could obtain the data and blackmail you or what ever.
Zerocash could possibly ameliorate that horrible future (because all incriminating data is entirely encrypted into a featureless blob before it leaves your computer). So I say paradigmatic distinction.
The problem is, at that threat level you can't know that any of those 10 cameras on every rooftop along with other such techniques known and unknown aren't shoulder-surfing you before that blob leaves your computer or using some other techniques. It is even possible to use technology to see through walls, so closing the window or staying away from windows may not help you. (Maybe they can't see your screen through walls, but they can see your fingers typing, or eavesdrop as you use a voice interface.)
Guarding against surveillance of all kinds is really extremely difficult. To make any progress you have to narrow the problem, and attack in pieces. Zerocash is no panacea.