We will then have rules based on file hashes. People will obfuscate them, so it'll now be based on function signatures and API calls (get locale, screen size, OS, set cookie? No network requests for you). When that's bypassed, maybe we will see DPI of network requests for patterns.
The arms race is only going to continue if trackers play the game. I think we'll probably see server side analytics instead, with Google and so making Apache/nginx/express modules and middlewear.
