One thing I know for sure is that those leaks caused a lot of the tech community to go a lot harder into encryption.
The reason practically all sites are HTTPS now can be traced to this. Many, if not most, sites in 2012 were plain http. Which is actually difficult for me to remember despite working on sites as a sysadmin back then.
I don’t think anyone was convicted, maybe some resignations and a lot of very uncomfortable questions from the senate- and likely some policy changes, though I can’t point to them.