What it boils down to is this: we now know for sure that nothing that you do online is immune to surveillance, and the only people who retain any hope of secure communications are geeks who understand cryptography and use open-source software.
This is a big deal by any standards and we are all in Snowden’s debt, for he has sacrificed his prospects of freedom and a normal life so that the rest of us would know what has happened to the technologies on we now depend. We can no longer plead ignorance as an excuse for alarm or inaction.